Doctor of Philosophy

Master of Engineering

Bachelor of Engineering

High Frequency Magnetic Materials

Microwave Magnetics

High Frequency Power Magnetics

Magnetic Sensor

2005
Professor, Faculty of Engineering, Shinshu University

1996 - 2005
Associate Professor, Faculty of Engineering, Shinshu University

1996 - 1996
Manager, Semiconductor Div., TOSHIBA Corp.

1989 - 1996
Researcher, R&D Center, TOSHIBA Corp.

1986 - 1989, Chiba University, Graduate School of Science and Technology, Product Engineering

1982 - 1984, Chiba University, Graduate School of Engineering, Electrical Engineering

1980 - 1982, Chiba University, Faculty of Engineering, Electrical Engineering

2023
Executive Committee Chair, IEEE Japan SYWL Workshop (held in Nagano, Japan)

2023
Executive Committee Chair, IEEE Japan Metro Area Workshop (held in Nagano, Japan)

2022 - 2023
Local Committee Member, International Symposium on Integrated Magnetics 2023 (iSIM2023), Sendai, Japan, May14-15, 2023

2022 - 2022
日本磁気学会第46回学術講演会、実行委員会委員長, Magnetics Society of Japan

2021 - 2023
Chair, IEEE Region 10, Shin-etsu Section

2021 - 2023
Vice Chair, IEEE MAG-33 Shin-etsu Chapter

2020 - 2025
Chair, Techniacal Committee on Magnetics, Institute of Electrical Engineers of Japan

2019 - 2020
Vice Chair, IEEE Region 10, Shin-etsu Section

2019 - 2020
Chair, IEEE MAG-33 Shin-etsu Chapter

2018 - 2019
Organizing Committee Member, International Symposium on Advanced Power Packaging 2019, ISAPP2019 (Osaka, Japan)

2014 - 2015
Technical Program Committee Member, International Telecommunications Energy Conference, INTELEC2015 (Osaka, Japan), IEEE Power Electronics Society

2013 - 2014
Auditor, Fundamentals and Materials Society, Institute of Electrical Engineers of Japan

2013 - 2014
Executive Committee Member, International Conference on Microwave Magnetics, ICMM2014 (Boston, USA), IEEE Magnetics Society

2013 - 2014
Program Committee Chair, International Conference on Microwave Magnetics, ICMM2014 (Boston, USA), IEEE Magnetics Society

2012 - 2018
Member, Techniacal Committee on Magnetics, Institute of Electrical Engineers of Japan

2012 - 2013
Advisor to the Board of Directors, Magnetics Society of Japan

2009 - 2011
Editorial Director, Magnetics Society of Japan

2007 - 2008
Advisory Committee Member, 7th International Workshop on high frequency micromagnetic devices and materials, MMDM7 (Sacramento, USA), IEEE Magnetics Society

2006 - 2008
Council Member, Magnetics Society of Japan

2006 - 2007
Advisory Committee Member, 6th International Workshop on high frequency micromagnetic devices and materials, MMDM6 (Madrid, Spain), IEEE Magnetics Society

2005 - 2006
Advisory/Program Committee Member, 5th International Workshop on High Frequency Micromagnetic Devices and Materials, MMDM5 (Baltimore, USA)

2005 - 2005
日本応用磁気学会第29回学術講演会、実行委員会事務局長, Magnetics Society of Japan

2004 - 2005
Program Committee Member, Internatinal Magnetics Conference, INTERMAG2005 (Nagoya, Japan), IEEE Magnetic Society

2004 - 2005
Advisory/Program Committee Member, 4th International Workshop on High Frequency Micromagnetic Devices and Materials, MMDM4 (San Diego, USA)

2002 - 2011
Member, Techniacal Committee on Magnetics, Institute of Electrical Engineers of Japan

2002 - 2003
Publications Chair, 2nd International Workshop on high frequency micromagnetic devices and materials, MMDM2 (Bostont,USA)

2002 - 2003
Executive Committee Member, IUMRS-ICAM 2003 (Yokohama, Japan)

2001 - 2002
Publications Chair, 1st International Workshop on high frequency micromagnetic devices and materials, MMDM1 (Delft,Netherlands)

1999 - 2009
Chief Editor, High frequency magnetics and measurement, Editorial Committee, Magnetics Society of Japan

1999 - 2005
Member, Techniacal Committee on Telecommunications Energy, Institute of Electroncs, Information and Communication Engineers of Japan

2024
Institute of Electrical Engineers of Japan, Fellow

2023
Magnetics Society of Japan, Encouragement Paper Award : Fabrication of Coupled Inductor for LLC Resonant Converter with a Current-Doubler Rectification Circuit, N. Kawada, H. Oyama, T. Minamisawa, M. Sonehara, and T. Sato, Journal of the Magnetics Society of Japan, Vol.7, No.1, pp.80-84, 2023.

2021
Japan Institute of Electronics Packaging, Academic Plaza 10 years Award, 2021 JPCA Show/Academic Plaza, Japan Institute of Electronics Packaging

2019
Japan Institute of Electronics Packaging, JIEP Poster Award of ICEP 2019, Au–Sn Soldering Using a Micro-heater to Restrain Excess Temperature Rise Inside the Package, Hideaki Mizusaki, Toshiro Sato, Makoto Sonehara

2019
Magnetics Society of Japan, Encouragement Paper Award ;Integrated CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Magnetic Core Inductor, T. Akiyama, S. Ishida, T. Shirasawa, T. Fukuoka, S. Hara, H. Yoshida, M. Sonehara, T. Sato, K. Miyaji, Journal of the Magnetics Society of Japan, Vol.43, No.3, pp.64-69, May 2019..

2018
Japan Institute of Electronics Packaging, 2018 Academic Plaza Award, 2018 JPCA Show/Academic Plaza, Japan Institute of Electronics Packaging

2017
Magnetics Society of Japan, Encouragement Paper Award ; Low permeability composite magnetic core transformer with high coupling coefficient and its application to PFM controlled quasi-resonant mode flyback-type DC-DC converter, K. Sato, T. Sato, M. Sonehara, H. Takeuchi, Journal of the Magnetics Society of Japan, Vol.41, No.6, pp.132-139, Dec. 2017.

2017
Magnetics Society of Japan, Encouragement Paper Award : Investigation on Improvement of Figure of Merit of Faraday-effect of Fe (Co) Thin Film by Introduction of Induced Transmission Filter, M. Miyamoto, T. Kubo, T. Hanada, H. Ihara, T. Sato, M. Sonehara, Journal of the Magnetics Society of Japan, Vol.1, No.1, pp.14-19, 2017.

2015
Magnetics Society of Japan, MSJ Distinguished Paper Award, K. Hagita, Y. Yazaki, Y. Kondo, M. Sonehara, T. Sato, T. Fujii, K. Kobayashi, S. Nakazawa, H. Shimizu, T. Watanabe, Y. Seino, N, Matsushita, Y. Yanagihara, T. Someya, H. Fuketa, M. Takamiya, and T. Sakurai, "CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor", Journal of the Magnetics Society of Japan, Vol.39, No.2, pp.71-79 (2015)

2015
Japan Institute of Electronics Packaging, Excellent Presentation Award, Spring Meeting, Japan Institute of Electronics Packaging

2015
Japan Institute of Electronics Packaging, Academic Plaza 5 years Award, 2015 JPCA Show/Academic Plaza, Japan Institute of Electronics Packaging

2013
Japan Institute of Electronics Packaging, 2013 Academic Plaza Award, 2013 JPCA Show/Academic Plaza, Japan Institute of Electronics Packaging

2013
11th International Conference on Ferrites 2013 (ICF11), ICF11, New Product & Novel Technology Award; Kazuhiro Hagita, Hiroki Kobayashi, Fumihiro Sato, Yuichiro Yazaki, Makoto Sonehara, Toshiro Sato, Tetsuro Watanabe, Nobuhiro Matsushita, Tomoharu Fujii, Hiroshi Shimizu, Kazutaka Kobayashi, "Magnetic Properties of Spin-sprayed Ferrite Film Deposited on Glass/Epoxy Build-up Layer in Organic Interposer Substrate", THE 11TH INTERNATIONAL CONFERENCE ON FERRITES, 17pP-51 (2013).

2012
IEEE Sensors 2012, IEEE Sensors 2012, Best Papers Award; N. Hirokubo, H. Komatsu, N. Hashimoto, M. Sonehara, T. Sato, "Wideband Visible Wavelength Range MEMS Fabry-Perot Tunable Filter with Calibration System", Proceedings of IEEE SENSORS 2012, pp.303-306 (2012).

1999
Magnetics Society of Japan, MSJ Distinguished Paper Award, T. Sato, S. Ikeda, K. Yamasawa, T. Mizoguchi, "Transmission-Line Low-Pass Filter Composed of Inner Copper Conductor Lines, Dielectric layeres, and Electrically Grounded Metallic Magnetic Layers", Journal of the Magnetics Society of Japan, Vol.23， No.4-2，pp.1653-1656 (1999)．

1994
Institute of Electrical Engineers of Japan, Excellent Paper Presentation Award, Institute of Electrical Engineers of Japan

Fabrication of Fe-based Nanocrystalline Spherical and Flake Powder Composite Magnetic Cores for Tens of MHz and their Application to Planar Power Inductor
Soichi Kimura, Kota Koike, Motohiro Kanai, Ryohei Miyata, Toshitaka Minamisawa, Kousuke Miyaji, Makoto Sonehara, Toshiro Sato
IEEJ Transactions on Fundamentals and Materials, 144(6), 199-206, Jun. 2024

Fabrication of Fe-Based Nanocrystalline Powder-Pressed Magnetic Core and Application to Planar Reactor for Hundreds of kHz or Beyond
Takanori Kanaya , Ryosuke Ohta, Makoto Sonehara , and Toshiro Sato
IEEE Transactions on Magnetics, 59(11), #2801006 (6 pages), Nov. 2023

Development of an Optical Probe Current Sensor for Local and Narrow Area Measurement Using Magnetic Domain Reversal in Bismuth-Substituted Rare-Earth Iron Garnet Crystal
Satoshi Sue, Mitsunori Miyamoto, Toshiya Kubo, Makoto Sonehara, and Toshiro Sato
IEEE Transactions on Magnetics, 59(11), #4000506 (6 pages), Nov. 2023

Magnetic Properties of Soft Magnetic Powder/Epoxy Composite Sheet
Hideki Oyama, Nanami Kawada, and Toshiro Sato
IEEE Transactions on Magnetics, 59(11), #2001205 (5 pages), Nov. 2023

Crossed Anisotropy Multilayered Nanogranular Films Combining High Permeability, Ferromagnetic Resonance Frequency, and Resistivity
Masayuki Naoe, Makoto Sonehara, Kousuke Miyaji, Toshiro Sato, Yasushi Endo, Sho Muroga, Nobukiyo Kobayashi, and Ken-Ichi Arai
IEEE Transactions on Magnetics, 59(11), #2300305 (5 pages), Nov. 2023

Reduction of Alternating-Current Resistance and Heat Generation of Spiral Inductors with Magnetic Sealing Technique
Kazuhiro Shimura, Takanori Kanaya, Shigeki Kobayashi, Mitsuhide Sato, Makoto Sonehara, Toshiro Sato, Tsutomu Mizuno
IEEJ Transactions on Electrical and Electronic Engineering, 18(9), 1533-1543, Sep. 2023

A basic study on braking and regenerative braking torques for an axial gap type eddy current brake
Naoki Morishita, Michiro Funaki, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS, 71(s1), S383-S392, Apr. 2023

Transient Characteristics of Cylindrical Magneto-rheological Fluid Brakes
Hiroki Shiga , Kazuki Nagashima, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of 2021 IEEE International Conference on Electrical, Control and Instrumentation Engineering, Kuala Lumpur, Malaysia, -4 pages, Nov. 2021

Considerations of DC/AC Eddy Current Brake Using Clad Material for Aircraft
Kodai Kitahara, Kentaro Hori, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of 2021 IEEE International Conference on Electrical, Control and Instrumentation Engineering, Kuala Lumpur, Malaysia, -5 pages, Nov. 2021

Considerations for Shear Stress in Cylindrical Magneto-rheological Fluid Brakes for Aircraft under High Temperature and in High Magnetic Fields
Kazuki Nagashima, Hiroki Shiga, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of 2021 IEEE International Conference on Electrical, Control and Instrumentation Engineering, Kuala Lumpur, Malaysia, -6 pages, Nov. 2021

Study of Effects of Magnetic Pole Arrangement on Braking Torque of Eddy Current Brakes
Kentaro Hori, Daichi Mochizuki, Yosimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of 2021 IEEE International Conference on Electrical, Control and Instrumentation Engineering, Kuala Lumpur, Malaysia, -6 pages, Nov. 2021

Performance Comparison of Ferrite and Nanocrystalline Cores for Medium-Frequency Transformer of Dual Active Bridge DC-DC Converter
Sakda Somkun, Toshiro Sato, Viboon Chunkag, Akekachai Pannawan, Pornnipa Nunocha and Tawat Suriwong
Energies, 14(2407), 21 pages, Apr. 2021

Fundamental Study of Eddy Current Brakes by Using Magnetic Clad Material
Kentaro Hori, Daichi Mochizuki, Yosimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of International Conference on Electrical Machines 2020 (ICEM2020), Virtual conference, Gothenburg, Sweden, Paper ID; SD-003123, 6 pages, Aug. 2020

Analysis and Examination of Eddy Current Brake for Aircraft Using Composite Disc
Daichi Mochizuki, Kentaro Hori, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of International Conference on Electrical Machines 2020 (ICEM2020), Virtual conference, Gothenburg, Sweden, Paper ID; SD-004898, 6 pages, Aug. 2020

Braking Torque and Time Constant in Aircraft Magneto-rheological Fluid Brake at High Temperature
Hiroki Shiga, Yoshimi Kikuchi, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato
Proceedings of International Conference on Electrical Machines 2020 (ICEM2020), Virtual conference, Gothenburg, Sweden, Paper ID; SD-006777, 5 pages, Aug. 2020

Fundamental Study of Magnetrorheological Fulid Brakes for Regional Jets
T. Sumi, N. Sato, M. Sonehara, T. Sato, H. Wakiwaka and Y. Kikuchi
Journal of the Japan Society of Applied Electromagnetics and Mechanics, 27(1), 122-127, May 2019

Integrated CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Magnetic Core Inductor
T. Akiyama, S. Ishida, T. Shirasawa, T. Fukuoka, S. Hara, H. Yoshida, M. Sonehara, T. Sato, K. Miyaji
Journal of the Magnetics Society of Japan, 43(3), 64-69, May 2019

Au–Sn Soldering Using a Micro-heater to Restrain the Excess Temperature Rise Inside the Package
Hideaki Mizusaki, Toshiro Sato, Makoto Sonehara
Proceedings of 2019 International Conference on Electronics Packaging (ICEP 2019), Niigata, Japan, P02, 6 pages, Apr. 2019

An 86% Eficiency, 20MHz, 3D-Integrated Buck Converter with Magnetic Core Inductor Embedded in Interposer Fabricated by Epoxy/Magnetic-Filler Composite Build-Up Sheet
Takanobu Fukuoka, Yuki Karasawa, Tomoki Akiyama, Ryoutaro Oka, Shu Ishida, Tomohiro Shirasawa, Makoto Sonehara, Toshiro, Sato, Kousuke Miyaji
Proceedings of the 34th Applied Power Electronics Conference and Exposition 2019 (APEC2019), 1561-1566, Mar. 2019

Enhancement of Faraday effect of transparent ferromagnetic Co-MgF2 granular film by introducing Fabry-Perot resonant structure
Miyamoto M., Kubo T., Fujishiro Y., Shiota K., Sonehara M., Sato T.
ELECTRICAL ENGINEERING IN JAPAN, 206(4), 3-10, Mar. 2019

Loss Reduction of LLC Resonant Converter using Magnetocoated Wire
Tatsuya Yamamoto, Yasuyuki Konno, Kanako Sugimura, Toshiro Sato, Yinggang Bu, Tsutomu Mizuno
IEEJ Journal of Industry Applications, 8(1), 51-56, Jan. 2019

Fabrication and Evaluation of Composite Magnetic Core Using Iron-Based Amorphous Alloy Powder with Different Particle Size Distributions
Naoki Yabu, Kanako Sugimura, Makoto Sonehara, Toshiro Sato
IEEE Transactions on Magnetics, 54(11), #2801605-1-#2801605-5, Nov. 2018

Novel Method for Making Surface Insulation Layer on Fe-Based Amorphous Alloy Powder by Surface-Modification using Two-Step Acid Solution Processing
Kanako Sugimura, Naoki Yabu, Makoto Sonehara, Toshiro Sato
IEEE Transactions on Magnetics, 54(11), #2801805-1-#2801805-5, Nov. 2018

Fabrication of Ferromagnetic Co–MgF2 Granular Film with High Transmittance and Large Faraday Effect for Optical Magnetic Field Sensor
Mitsunori Miyamoto, Toshiya Kubo, Yuta Fujishiro, Kenta Shiota, Makoto Sonehara, Toshiro Sato
IEEE Transactions on Magnetics, 54(11), #2501205-1-#2501205-5, Nov. 2018

Core-shell structured Mn-Zn-Fe ferrite/Fe-Si-Cr particles for magnetic composite cores with low loss
Satoshi Mori, Takeshi Mitsuoka, Kanako Sugimura, Ryosuke Hirayama, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita
ADVANCED POWDER TECHNOLOGY, 29(6), 1481-1486, Jun. 2018

Pseudo-differential CMOS analog front-end circuit for wide-bandwidth optical probe current sensor
Takaharu Uekura, Kousuke Oyanagi, Makoto Sonehara, Toshiro Sato, and Kousuke Miyaji
Japanese Journal of Applied Physics, 57(04FF06), 1-6, Mar. 2018

Low permeability composite magnetic core transformer with high coupling coefficient and its application to PFM controlled quasi-resonant mode flyback-type DC-DC converter
K. Sato, T. Sato, M. Sonehara, H. Takeuchi
Journal of the Magnetics Society of Japan, 41(6), 132-139, Dec. 2017

Surface-Oxidized Amorphous Alloy Powder/Epoxy-Resin Composite Bulk Magnetic Core and Its Application to Megahertz Switching LLC Resonant Converter
Kanako Sugimura, Daisuke Shibamoto, Naoki Yabu, Tatsuya Yamamoto, Makoto Sonehara, Toshiro Sato, Tsutomu Mizuno, and Hideaki Mizusaki
IEEE Transactions on Magnetics, 53(11), #2801406-1-#2801406-6, Nov. 2017

Characterization of UHF Band LC Filter With RF Spiral Inductor Using Carbonyl-Iron Powder/Epoxy Composite Magnetic and Chip Capacitor
Makoto Sonehara, Sota Yamaguchi, Yuki Miyajima, Toshiro Sato, Takeshi Inomata, and Yuji Ono
IEEE Transactions on Magnetics, 53(11), #4002905-1-#4002905-5, Nov. 2017

Transient Response Improvement of Digitally Controlled DC-DC Converter with Feedforward Compensation
Kosuke Sato, Toshiro Sato, Makoto Sonehara
Proceedings of the International Telecommunications Energy Conference 2017 (INTELEC2017), 609-614, Oct. 2017

Fabrication and evaluation of dispersed-Ag nanoparticles-in-polyimide thin films
Makoto Sonehara, Yuki Watanabe, Sota Yamaguchi, Takanori Kato, Yasuaki Yoshisaku, Toshiro Sato, and Eiji Itoh
Japanese Journal of Applied Physics, 56(10S), 10PB05 (4 pages), Sep. 2017

High permeability and low loss of Ni-Zn-Fe ferrite/metal composite cores in high frequency region
Satoshi Mori, Takeshi Mitsuoka, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita
AIP Advances, 7, 056657-1-7, Feb. 2017

Relative Estimation of Water Content for Flat-Type Inductive-Based Oil Palm Fruit Maturity Sensor
Norhisam Misron, Nor Aziana Aliteh, Noor Hasmiza Harun, Kunihisa Tashiro, Toshiro Sato and Hiroyuki Wakiwaka
Sensors, 17(1), 10page, Jan. 2017

Fundamental study of high Q-factor RF spiral inductor using carbonyl-iron/epoxy composite magnetic core
Makoto Sonehara, Kazuaki Furihata, Jun Koguchi, Shingo Tanaka and Toshiro Sato
IEEJ Transactions on Electrical and Electronic Engineering, 11(s1), S3-S8, Aug. 2016

Fundamental Study of Non-Contact Water Salinity Sensor by Using Electromagnetic Means for Seawater Desalination Plants
Makoto Sonehara, Nguyen Van Toai, Toshiro Sato
IEEE Transactions on Magnetics, 52(7), #4001604-1-#4001604-4, Jul. 2016

Formation of high electrical-resistivity thin surface layer on carbonyl-iron powder (CIP) and thermal stability of nanocrystalline structure and vortex magnetic structure of CIP
K. Sugimura, Y. Miyajima, M. Sonehara, T. Sato, F. Hayashi, N. Zettsu, K. Teshima, and H. Mizusaki
AIP Advances, American Institute of Physics, 6, 055932-1-055932-8, May 2016

Fabrication and Evaluation of Electromagnetic Defect Detector for Laser Welding Joint on Stainless Steel Pipe
Makoto Sonehara, Fumiya Nagashima, Toshiro Sato, Kohei Yazaki, Noritaka Aota, Susumu Shimadu
Proceedings of the ICST2015 (International Conference on Sensing Technology 2015), Auckland, New Zealand, 338-341, Dec. 2015

Transient Response Improvement of Digitally Controlled Buck-Type DC-DC Converter with Feedforward Compensator
Kosuke Sato, Toshiro Sato, Makoto Sonehara
Proceedings of the International Telecommunications Energy Conference 2015 (INTELEC2015), 1153-1157, Oct. 2015

Embedded Planar Power Inductor Technology for Package-level DC Power Grid
Yuta Kondo, Yuichiro Yazaki, Makoto Sonehara, Toshiro Sato, Tetsuro Watanabe, Yuto Seino, Nobuhiro Matsushita, Tomoharu Fujii, Kazutaka Kobayashi, Hiroshi Shimizu, Yuki Yanagisawa, Teruki Someya, Hiroshi Fuketa, Makoto Takamiya, Takayasu Sakurai
ICEP-IAAC 2015 Proceedings (2015 International Conference on Electronics Packaging & iMAPS All Asia Conference), 814-817, Apr. 2015

Control of Magnetic Moment in Uniaxial Anisotropy Magnetic Thin Film Taking Leakage Flux in RF Planar Spiral Inductors with Closed-Magnetic Core into Account
Makoto Sonehara, Kenji Ikeda and Toshiro Sato
ELECTRICAL ENGINEERING IN JAPAN, 191(2), 1-6, Apr. 2015

CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor
K. Hagita, Y. Yazaki, Y. Kondo, M. Sonehara, T. Sato, T. Fujii, K. Kobayashi, S. Nakazawa, H. Shimizu, T. Watanabe, Y. Seino, N, Matsushita, Y. Yanagihara, T. Someya, H. Fuketa, M. Takamiya, and T. Sakurai
Journal of the Magnetics Society of Japan, 39(2), 71-79, Mar. 2015

Development of Optical Probe Current Sensor with Kerr Effect for Power Electronics
Daiki Karasawa, Makoto Sonehara, Shin Kitazawa, Toshiro Sato
IEEE Sensors 2014 Proceedings, Valencia, Spain, 1928-1931, Nov. 2014

Embedded Planar Power Inductor in an Organic Interposer for Package-Level DC Power Grid
Yuichiro Yazaki, Kazuma Ishidate, Kazuhiro Hagita, Yuta Kondo, Saki Hattori, Makoto Sonehara, Toshiro Sato, Tetsuro Watanabe, Yuto Seino, and Nobuhiro Matsushita
IEEE Transactions on Magnetics, 50(11), #8401304-1-#8401304-4, Nov. 2014

Efficiency Increase in On-Chip Buck Converter by Introduction of High Permeability Material to Inductor on Interposer
H. Fuketa, Y. Shinozuka, K. Ishida, M. Takamiya, T. Fujii, H. Shimizu, K. Kobayashi, T. Sato, T. Sakurai
Journal of the Japan Society of Powder and Powder Metallurgy, 61(s1), S340-S342, May 2014

Wafer level package by using post dicing process
Noriyuki Fujimori, Takatoshi Igarashi, Takahiro Shimohata, Takuro Suyama, Kazuhiro Yoshida, Yusuke Nakagawa, Tsutomu Nakamura, and Toshiro Sato
ICEP2014 Proceedings (International Conference on Electronics Packaging 2014), 34-38, Apr. 2014

Magnetic and electronic properties of bimagnetic materials comprising cobalt particles within hollow silica decorated with magnetite nanoparticles
T. Okada, Y. Gonzalez-Alfaro, A. Espinosa, N. Watanabe, T. Haeiwa, M. Sonehara, S. Mishima, T. Sato, A. Munoz-Noval, P. Aranda, M. Garcia-Hernandez, E. Ruiz-Hitzky
JOURNAL OF APPLIED PHYSICS, 114(12), 124304, Sep. 2013

Wideband Visible Wavelength Range MEMS Fabry-Perot Tunable Filter with Highly Accurate Calibration System
Nozomu Hirokubo, Hiroshi Komatsu, Nobuaki Hashimoto, Makoto Sonehara, and Toshiro Sato
IEEE Sensors Journal, 13(8), 2930-2936, Aug. 2013

Influence of Initial Surface Roughness on Severe Wear Volume for SUS304 Austenitic Stainless Steels
A. Kawamura, K. Ishida, K. Okada, T. Sato
International Journal of Chemical, Materials Science and Engineering, 7(11), 126-130, Jul. 2013

Characterization of Tunable Magnetic Sensor Using Bias Magnetic Field of a Hard Magnetic Film Magnetized by Pulsed-Magnetic Field
M. Sonehara, H. Kamada, S. Iida, T. Sato
IEEE Transactions on Magnetics, 49(7), 3854-3857, Jul. 2013

Carbonyl-Iron/Epoxy Composite Magnetic Core for Planar Power Inductor Used in Package-Level Power Grid
Y. Sugawa, K. Ishidate, M. Sonehara, T. Sato
IEEE Transactions on Magnetics, 49(7), 4172-4175, Jul. 2013

90% High Efficiency and 100-W/cm3 High Power Density Integrated DC-DC Converter for Cellular Phones
Satoshi Sugahara, Kouhei Yamada, Masaharu Edo, Toshiro Sato, and Kiyohito Yamasawa
IEEE Transactions on Power Electronics, 28(4), 1994-2004, Apr. 2013

Fabrication of a Zn ferrite thick film planar power inductor for DC-DC converter LSI package
S. Okazaki, A. Takeuchi, A. Takeshima, M. Sonehara, T. Sato, N. Matsushita
Electronics and Communications in Japan, 96(4), 53-60, Apr. 2013

Wideband visible wavelength range MEMS Fabry-Perot Tunable Filter with Ag alloy mirror
N. Hirokubo, H. Komatsu, N. Hashimoto, M. Sonehara, T. Sato
Electronics and Communications in Japan, 96(3), 17-23, Mar. 2013

A Possibility of Magnetic Field Biasing Tunable Inductive Device Using a Hard Magnetic Film Magnetized by Pulsed-Magnetic Field
Yosuke Obinata, Megumi Yuki, Makoto Sonehara, Yutaka Kuramoto, Kunihiko Suzuki, Toshiro Sato
IEEE Transactions on Magnetics, 49(3), 978-981, Mar. 2013

Relation Between High-Frequency Properties and Direction of Anisotropy Magnetic Field in Magnetic Thin Film for RF Inductor Applications
Makoto Sonehara, Toshiro Sato
IEEE Transactions on Magnetics, 48(11), 4515-4517, Nov. 2012

Wideband Visible Wavelength Range MEMS Fabry-Perot Tunable Filter with Calibration System
N. Hirokubo, H. Komatsu, N. Hashimoto, M. Sonehara, T. Sato
Proceedings of IEEE SENSORS 2012, 303-306, Oct. 2012

Planar Power Inductor with Magnetic Film for Embedded LSI Package
Tomoharu Fujii, Kazutaka Kobayashi, Hiroshi Shimizu, Shinji Nakazawa, Toshiro Sato, Fumihiro Sato, Hiroki Kobayashi
45th International Symposium on Microelectronics 2012 Proceedings, 464～472, Sep. 2012

Optical Probe Current Sensor Module using the Kerr Effect of Exchange-coupled Magnetic Film and its Application to IGBT Switching Current Measurements
K. Ogawa, S. Suzuki, M. Sonehara, T. Sato, K. Asanuma
International Journal on Smart Sensing and Intelligent Systems, 5(2), 347-361, Jun. 2012

Optical probe current sensor module using the Kerr effect and its application to IGBT switching current measurements
Keisuke Ogawa，Shin Suzuki，Makoto Sonehara，Toshiro Sato，Kazushi Asanuma
Proceedings of 5th International Conference on Sensing Technology 2011 (ICST2011), Palmerston North, New Zealand, Nov. 2011

Increase of Q-Factor of RF Magnetic Thin Film Inductor by Introducing Slit-Patterned Magnetic Thin Film and Multiline-Conductor Spiral Coil
Takayuki Maruyama, Yosuke Obinata, Makoto Sonehara, Kenji Ikeda, Toshiro Sato
IEEE Transactions on Magnetics, 47(10), 3196-3199, Oct. 2011

Fabrication of Planar Power Inductor for Embedded Passives in LSI Package for Hundreds Megahertz Switching DC-DC Buck Converter
Hideyuki Ito, Asako Takeuchi, Shinya Okazaki, Hiroki Kobayashi, Yuichiro Sugawa, Akihiro Takeshima, Makoto Sonehara, Nobuhiro Matsushita, Toshiro Sato
IEEE Transactions on Magnetics, 47(10), 3204-3207, Oct. 2011

Characteristic Analysis of a Micro DC-DC Converter for Portable Electronic Devices and an Improvement of Transient Response Characteristic
S. Sugahara, K. Yamada, H. Nishio, M. Edo, T. Sato, and K. Yamasawa
ELECTRICAL ENGINEERING IN JAPAN, 175(3), 56-64, Mar. 2011

Crystal Orientation of Co35Fe65 Thin Film for the GHz Frequency Use with More Than 10 GHz
Makoto Munakata, Shin-ichi Aoqui, Masatoshi Ohkoshi, Koichiro Maki, Makoto Sonehara, Kenji Ikeda, Toshiro Sato
Journal of the Magnetics Society of Japan, 34(3), 248-253, May 2010

Strain sensor using stress-magnetoresistance effect of Ni–Fe/Mn–Ir exchange-coupled magnetic film
M. Sonehara, T. Shinohara, T. Sato, K. Yamasawa, Y. Miura
JOURNAL OF APPLIED PHYSICS, 107(9), 3 pages, May 2010

Development of an Electromagnetic Wave Shielding Textile by Electroless Ni-Based Alloy Plating
M. Sonehara, S. Noguchi, T. Kurashina, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 45(10), 4173-4175, Oct. 2009

Cross-Talk Suppression in High-Density Printed Circuit Boards Using Magnetic Composite Filled in Spacing Between Signal Lines
S. Kayama, M. Sonehara, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 45(10), 4801-4803, Oct. 2009

Optical/High-frequency Applications of Functional Magnetic Materials
Mitsuteru Inoue, Toshiro Sato
IEEJ Transactions on Electrical and Electronic Engineering, 4(1), 6-7, Feb. 2009

Fundamental study of optical probe current sensor using Kerr effect of single magnetic domain film
M. Sonehara, K. Asanuma, N. Otani, T. Goto, Y. Kikuchi, T. Sato, K. Yamasawa, Y. Miura
Proceedings of the 18th IEEE Conference on Sensors (IEEE Sensors 2009), 1232-1237, 2009

CoFeSio/SiO2 multilayer granular films with very narrow ferromagnetic resonant linewidth
K. Ikeda, T. Suzuki, T. Sato
IEEE Transactions on Magnetics, 45(10), 4290-4293, 2009

FeNiSiO/SiO2 multi-layer granular magnetic films with high-resistivity
K. Ikeda, T. Suzuki, T. Sato
Transactions of the Materials Research Society of Japan, 34(1), 9-13, 2009

Low Power Consumption and High Power Density Integrated DC-DC Converter for Portable Equipments
S. Sugahara, K. Yamada, M. Edo, T. Sato, K. Yamasawa
Proceedings of the IEEE Asian Solid-State Circuit Conference (ASSCC2008), 149-152, 2008

Synthesis and Characterization of Temperature Sensitive Li-Zn-Cu Ferrite
M. Naoe, T. Omura, T. Sato, K. Yamasawa, Y. Miura
Japanese Journal of Applied Physics, 47(1), 550-553, 2008

Magnetic properties of Co-Sm amorphous films in GHz band
K. Ikeda, T. Suzuki, T. Sato
Journal of the Magnetics Society of Japan, 32(3), 179-186, 2008

Basic investigation of microtemperature sensor by means of a novel transmission-line technique using a temperature-sensitive Li-Zn-Cu ferrite substrate
M. Naoe, R. Takahashi, T. Omura, Y. Hotta, T. Sato, K. Yamasawa, Y. Miura
Journal of the Magnetism and Magnetic Materials, 320(20), 949-953, 2008

Suppression of Sm Segregation and Improvement in Thermal Stability by Introducing Ru Underlayer in Co-Sm Amorphous Films
K. Ikeda, T. Suzuki, T. Sato
IEEE Transactions on Magnetics, 44(11), 3906-3909, 2008

Preparation and Characterization of Nanofiber Nonwoven Textile for Electromagnetic Wave Shielding
M. Sonehara, T. Sato, M. Takasaki, H. Konishi, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 44(11), 3107-3110, 2008

Characterization of novel chip temperature-sensing device using Mn-substituted Li-Zn-Cu ferrite
M. Naoe, M. Oishi, S. Okazaki, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 44(11), 2985-2988, 2008

High efficiency PWM controlled micro DC-DC converter for portable electronic equipments
S. Sugahara, K. Yamada, T. Kawashima, M. Edo, T. Sato, K. Yamasawa
IEICE TRANSACTIONS ON COMMUNICATIONS, E91-B(11), 3704-3711, 2008

Ferromagnetic Resonance Simulation of Mn-Ir/Fe-Si Exchange-Coupled Film on Basis of LLG Equation Taking Exchange-Stiffness Dispersion Model into Account
M. Sonehara, T. Ishikawa, K. Inagaki, T. Sato, K. Yamasawa, Y. Miura, H. Fujiwara
Journal of the Magnetics Society of Japan, 31(3), 153-158, 2007

Analysis of Directional Coupler Using Magnetic/Dielectric Hybrid Transmission-Line for Cellular Phone
K. Takizawa, S. Mizuta, M. Nakazawa, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, U. Uehara, M. Munakata, M. Yagi
2006 Asia-Pacific Microwave Conference Proceedings, 2, 1384-1387, 2006

Relation Between Microwave Complex Permeability and Ferromagnetic Fe-Si Layer Thickness in Mn-Ir/Fe-Si Exchange-Coupled Film
M. Sonehara, T. Sugiyama, T. Ishikawa, K. Inagaki, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 42(10), 2984-2986, 2006

MnIr/FeSi exchange-coupled multilayer film with plural ferromagnetic resonance absorptions for wideband noise filter
Sonehara, M. Ishikawa, T. Sugiyama, T. Sato, T. Yamasawa, K. Miura, Y.
JOURNAL OF APPLIED PHYSICS, 99, 08M309, 2006

Suppression of insertion loss by slit patterning of a magnetic film in a CoFeB/polyimide hybrid thin-film coplanar line for a rf impedance matching device
Nakayama, H. Yamamoto, Y. Mizoguchi, Y. Nakazawa, M. Sato, T. Yamasawa, K. Miura, Y. Miyake, Y. Akie,M . Uehara, Y. Munakata, M. Yagi, M.
JOURNAL OF APPLIED PHYSICS, 99, 08P508, 2006

Development of an Integrated RF Impedance Matching Device with LPF Function using a CoFeB Magnetic/Polyimide Dielectric Hybrid Thin-Fim Coplanar-Line
H. Nakayama, T. Yamamoto, Y. Mizoguchi, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata
2005 Asia-Pacific Microwave Conference Proceedings, 720-722, 2005

Directional Coupler Composed of CoFeB Metallic Magnetic Film/Polyimide Dielectric Film Hybrid Transmission-Line
K. Takizawa, M. Nakazawa, T. Sato, K. Yamasawa, Y. Miura, M. Munakata, M. Yagi
2005 Asia-Pacific Microwave Conference Proceedings, 2819-2822, 2005

A planar inductor using Mn-Zn ferrite/polyimide composite thick film for low-voltage and large-current dc-dc converter
I. Kowase, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 41(10), 3991-3993, 2005

A Thin Film Spiral Microstrip Transmission-Line Using CoZrNb Soft Magnetic Thin Film for a Quarter Wavelength Transformer
H. Suzuki, N. Sugiyama, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara
IEEE Transactions on Magnetics, 41(10), 3574-3576, 2005

A new wideband common-mode noise filter consisting of Mn-Zn ferrite core and copper/polyimide tape wound coil
K. Yanagisawa, F. Zhang, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 41(10), 3571-3573, 2005

Preparation and Characterization of Mn-Ir/Fe-Si Exchange-Coupled Multilayer Film With Ru Underlayer for High-Frequency Applications
M. Sonehara, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura
IEEE Transactions on Magnetics, 41(10), 3511-3513, 2005

Fabrication of a common- mode noise filter for balanced-mode signal transmission using Mn-Zn ferrite particle/polyimide composite thick film
T. Sato, T. Kokai, M. Moroishi, K. Yamasawa, T. Sakuma, H. Karasawa, K. Hirasawa
IEEJ Transactions on Fundamentals and Meterials, 124(1), 91-97, 2004

FeSi/IrMn Exchange-Coupled Multilayer Film with Plural FMR absorptions
M. Sonehara, T. Sato, K. Yamasawa, Y. Miura, M. Yamaguchi
Transactions of the Materials Research Society of Japan, 29(4), 1735-1738, 2004

Amplitude modulation effect of dc-dc converter noise on CMOS logic signal transmission on microstrip PCB
K.-I. Nishijima, T. Sato, K. Yamasawa
Proceedings of the IEEE International Telecommunications Energy Conference (INTELEC2003), 510-514, 2003

Spiral type transmission line with a Mn-Zn ferrite core
T. Sato, K. Sato, K. Yamasawa, F. Zhang, K. Yanagisawa
IEEE Transactions on Magnetics, 39(5), 3205-3207, 2003

A study on hybrid thin film microstrip line composed of CoZrNb metallic magnetic film and Polyimide dielectric film
T. Sato, S. Ikeda, K. Takizawa, and K. Yamasawa
2002 Asia-Pacific Microwave Conference Proceedings, 602-605, 2002

Relation between power dissipation and signal transmission characteristic in CoZrNb/Polyimide hybrid microstrip line
T. Sato, S. Ikeda, H. Nakayama, K. Takizawa, and K. Yamasawa
Transactions of the Magnetics Society of Japan, 2(5), 377-383, 2002

Measurement of the source impedance of conducted emission using mode separable LISN: Conducted emission of a switching power supply
J. Miyashita, M. Mitsuzawa, T. Karube, K. Yamasawa, T. Sato
ELECTRICAL ENGINEERING IN JAPAN, 139(2), 72-78, 2002

FeCoBN magnetic thin film inductor for MHz switching micro DC-DC converters
T. Sato, K. Yamasawa, H. Tomita, T. Inoue, T. Mizoguchi
IEEJ Transactions on Industrial Applications, 121-D, 84-89, 2001

A high sensitive multilayered parametric magnetic sensor
K. Karasawa, H. Matsushima, T. Sato, K. Yamasawa, Y. Tanno
Proceedings of the International Conference on Electrical Engineering (ICEE 2001), 3, 1677-1680, 2001

Multilayered transformer utilizing Mn-Zn ferrite and its application to a forward-type DC-DC converter
T. Sato, H. Yokoyama, K. Yamasawa, K. Toya, S. Kobayashi, T. Minamisawa
ELECTRICAL ENGINEERING IN JAPAN, 135(4), 1-8, 2001

A new multilayered common-mode filter on Ni-Zn ferrite substrate
T. Sato, S. Ikeda, Y. Hara, K. Yamasawa, T. Sakuma
IEEE Transactions on Magnetics, 37(4), 2900-2902, 2001

A thin film type magnetic/dielectric hybrid transmission-line with a large wavelength shortening
S. Ikeda, T. Sato, A. Ohshiro, K. Yamasawa, T. Sakuma
IEEE Transactions on Magnetics, 37(4), 2903-2904, 2001

A study of parametric models applied to in-service life prediction of dry vacuum pump
A. Ishida, S. Konishi, T. Sato, K. Yamasawa
Proceedings of IMACS Symposium on MATHEMATICAL MODELLING, 1, 111-114, 2000

Planar power inductor using FeCoBN magnetic film with high saturation magnetization and high electrical resistivity
T. Sato, K. Yamasawa, H. Tomita, T. Inoue, T. Mizoguchi
International Power Electronics Conference 2000 Proceedings (IPEC2000), 303-308, 2000

Thin film inductor for micro switching converters using a high resistive Fe-Zr-O film
Y. Sasaki, E. Komai, T. Hatanai, T. Sato, K. Yamasawa
International Power Electronics Conference 2000 Proceedings (IPEC2000), 315-319, 2000

Device simulations of magnetic/dielectric hybrid transmission-lines by using electromagnetic field analysis
S. Ikeda, N. Shirai, K. Ito, A. Hirano, T. Sato, K. Yamasawa
Proceedings of the 2nd Magneto-Electronics International Symposium (Nagano magel’99), 399-402, 1999

A small and thin common mode choke composed of multilayered transformer structure with high coupling coefficient
Y. Hara, T. Sato, K. Yamasawa, K. Toya, S. Kobayashi, T. Minamisawa
Proceedings of the 2nd Magneto-Electronics International Symposium (Nagano magel’99), 395-398, 1999

A new multilayered parametric magnetic sensor
K. Karasawa, H. Matsushima, Y. Tanno, T. Sato, K. Yamasawa
Proceedings of the 2nd Magneto-Electronics International Symposium (Nagano magel’99), 319-322, 1999

A novel transmission-line type high frequency transformer using a fine-grain Mn-Zn ferrite
T. Inoue, M. Furukawa, T. Sato, K. Yamasawa, T. Takahashi, Y. Sasaki, Y. Yamamoto, T. Hatanai, A. Makino
IEEE Transactions on Magnetics, 35(5), 3538-3540, 1999

Sputter-deposited FeCoBC/AlNx multilayered film for wet-etching process
H. Tomita, T. Inoue, T. Mizoguchi, T. Sato
IEEE Transactions on Magnetics, 35(5), 3571-3573, 1999

Frequency-modulation type magnetic field sensor using transmission-line magnetic device
S. Ikeda, T. Sato, K. Yamasawa
IEEE Transactions on Magnetics, 35(5), 3631-3633, 1999

Transmission-line low pass filter for switching power supplies
T. Sato, S. Ikeda, K. Yamasawa, T. Mizoguchi
Record of the IEEE Power Electronics Specialists Conference (PESC’98), 1972-1978, 1998

Operation characteristics of a buck/boost converter using a layered inductor with high resistive Fe(Co-Fe)-M-O (M=Hf, Zr, rare-earth) films
Y. Sasaki, S. Morita, T. Hatanai, A. Makino, T. Sato, K. Yamasawa
Record of the IEEE Power Electronics Specialists Conference (PESC’98), 1555-1560, 1998

A new multi-polar flat transformer and its application to a planar type DC/DC converter
T. Minamisawa, T. Sato, K. Yamasawa
Record of the IEEE Power Electronics Specialists Conference (PESC’98), 1548-1554, 1998

The optimum chip size of a thin film reactor for a high-efficiency operation of a micro dc-dc converter
S. Sugahara, M. Edo, T. Sato, K. Yamasawa
Record of the IEEE Power Electronics Specialists Conference (PESC’98), 1499-1503, 1998

New applications of nanocrystalline Fe(Co-Fe)-Hf-O magnetic films to micromagnetic devices
T. Sato, Y. Miura, S. Matumura, K. Yamasawa, S. Morita, Y. Sasaki, T. Hatanai, A. Makino
JOURNAL OF APPLIED PHYSICS, 83(11), 6658-6660, 1998

The effect of magnetic film structure on the inductance of a planar inductor
Inoue, T; Nishijima, K; Yatabe, S; Mizoguchi, T; Sato, T
IEEE Transactions on Magnetics, 34(4), 1372-1374, 1998

Application of nanocrystalline Fe (or Co-Fe)-Hf-O magnetic films with high electrical resistivity to micro DC-DC converters
T. Sato, E. Komai, K. Yamasawa, T. Hatanai, A. Makino
IEEE Transactions on Magnetics, 33(5), 3310-3312, 1997

High frequency soft magnetic properties of nanocrystalline Fe-(Co)-Hf-O films with high electrical resistivity and their application to micro DC-DC converter
Y. Sasaki, S. Morita, T. Hatanai, A. Makino, T. Sato, K. Yamasawa
Nanostructured Materials, 8(8), 1025-1032, 1997

5MHz switching micro dc-dc converter using planar inductor
T. Sato, T. Inoue, H. Tomita, S. Yatabe, K. Nishijima, Y. Tokai, M. Nameki, N. Saito, T. Mizoguchi
Proceedings of the IEEE International Telecommunications Energy Conference (INTELEC’96), 485-490, 1996

Epitaxial Fe72Co28(112) films grown on MgO(100) substrates
H. Tomita, A. Sawabe, T. Sato, T. Mizoguchi
Japanese Journal of Applied Physics, 34, 1851-1854, 1995

Simulation of Micro Magnetic Devices
T. Sato, T. Mizoguchi, M. Sahashi
IEEE Translation Journal on Magnetics in Japan, 9(4), 68-75, Apr. 1994

A magnetic thin film inductor and its application to a MHz switching dc-dc converter
T. Sato, H. Tomita, A. Sawabe, T. Inoue, T. Mizoguchi, M. Sahashi
IEEE Transactions on Magnetics, 30(2), 217-223, 1994

Oblique field annealing of CoZrNb amorphous magnetic thin film
H. Tomita, T. Sato, T. Mizoguchi
IEEE Transactions on Magnetics, 30(2), 1336-1339, 1994

Formula for dynamic power loss in ferrite cores taking into account displacement current
Y. Sakaki, M. Yoshida, T. Sato
IEEE Transactions on Magnetics, 29(6), 3517-3519, 1993

Planar inductor for very small dc-dc converters
T. Sato, M. Hasegawa, T. Mizoguchi, M. Sahashi
IEICE TRANSACTIONS ON COMMUNICATIONS, E75-B(11), 1186-1191, 1992

Study of high power planar inductor
T. Sato, M. Hasegawa, T. Mizoguchi, M. Sahashi
IEEE Transactions on Magnetics, 27(6), 5277-5279, 1991

Physical meaning of equivalent loss resistance of magnetic cores
T. Sato, Y. Sakaki
IEEE Transactions on Magnetics, 26(5), 2894-2897, 1990

Magnetization Mechanism of Polycrystalline Mn-Zn Ferrite in MHz Band
T. Sato, Y. Sakaki
IEEE Translation Journal on Magnetics in Japan, 3(7), 531-533, Jul. 1988

Discussion on eddy current loss under square wave voltage excitation
T. Sato, Y. Sakaki
IEEE Transactions on Magnetics, 24(6), 2904-2906, 1988

Very low loss ultrathin Co based amorphous ribbon cores
M. Yagi, T. Sato, Y. Sakaki, T. Sawa, K. Inomata
JOURNAL OF APPLIED PHYSICS, 64(10), 6050-6052, 1988

100kHz - 10MHz iron loss measuring system
T. Sato, Y. Sakaki
IEEE Transactions on Magnetics, 23(5), 2593-2595, 1987

Large signal eddy current losses beyond 100kHz
Y. Sakaki, T. Sato
IEEE Transactions on Magnetics, 20(5), 1487-1489, 1984

A high frequency iron loss measuring system
T. Katane, T. Yamaguchi, T. Ito, T. Sato, Y. Sakaki
IEEE Transactions on Magnetics, 20(5), 1729-1731, 1984

Loss evaluation in converter transformer cores
Y. Sakaki, T. Sato, T. Ito
Proceedings of the IEEE International Telecommunications Energy Conference (INTELEC’83), 408-412, 1983

Technology Trend in Magnetics, Special Issue Review (10)
H. Matsuki, K. Ishiyama, T. Sato, K. Kobayashi
IEEJ Transactions on Fundamentals and Materials, 129(2), 81-83, 2009

Fabrication of Planar Power Inductor for beyond 10MHz Using Fe-based Composite Magnetic Core
R. Miyata; S. Kimura; N. Kawada; T. Minamisawa; M. Sonehara; K. Miyaji; T. Sato
IEEE International Magnetics Conference 2023 (INTERMAG2023), AR-06, Sendai, Japan, May 2023

Development of an Optical Probe Current Sensor for Local and Narrow Area Measurement Using Magnetic Domain Reversal in Bi-Substituted Rare-Earth Iron Garnet Crystal
S. Sue; M. Miyamoto; T. Kubo; M. Sonehara; T. Sato
IEEE International Magnetics Conference 2023 (INTERMAG2023), AU-03, Sendai, Japan, May 2023

Fabrication of Fe-based nanocrystalline powder pressed magnetic core with low coercivity and small iron loss
T. Kanaya; R. Ohta; M. Sonehara; T. Sato
IEEE International Magnetics Conference 2023 (INTERMAG2023), BW-07, Sendai, Japan, May 2023

Magnetic Properties of Soft Magnetic Powder/Epoxy Composite Sheet
H. Ooyama; N. Kawada; T. Sato
IEEE International Magnetics Conference 2023 (INTERMAG2023), CF-08, Sendai, Japan, May 2023

Crossed Anisotropy Multilayered Nanogranular Films Combining High Permeability, Ferromagnetic Resonance Frequency, and Resistivity
M. Naoe; M. Sonehara; K. Miyaji; T. Sato; Y. Endo; N. Kobayashi; K. Arai
IEEE International Magnetics Conference 2023 (INTERMAG2023), EV-12, Sendai, Japan, May 2023

A Collaboration from High Frequency Soft Magnetic Materials to Integrated Circuit Design for beyond 10MHz Switching Power Supply (Invited)
K. Miyaji; M. Sonehara; T. Sato
IEEE International Magnetics Conference 2023 (INTERMAG2023), FA-06, Sendai, Japan, May 2023

Development of anisotropic nanocrystalline ribbon core and powdered core for high frequency transformers and inductors (Invited)
T. Sato; T. Tada; T. Kanaya; M. Sonehara; T. Mizuno
IEEE International Magnetics Conference 2023 (INTERMAG2023), HA-04, Sendai, Japan, May 2023

Fabrication and evaluation of anisotropic Fe-based nanocrystal alloy ribbons
Tomoya Tada, Makoto Sonehara, Toshiro Sato
IEEE Shin-etsu Section Student Branch (SSB) Online Poster Session 2022, Dec. 2022

Reducing Heat Generation in a Boost Inductor Using a Magnetic Tape
Kazuhiro SHIMURA, Takanori KANAYA, Syuichi HOSHINA, Shigeki KOBAYASHI, Mitsuhide SATO, Makoto SONEHARA, Toshiro SATO, Tsutomu MIZUNO
20th International Symposium on Applied Electromagnetics and Mechanics 2022 (ISEM2022), Jun. 2022

A basic study braking and regenerative braking torques for an axial gap type eddy current brake
Naoki Morishita, Michiro Funaki, Hiroyuki Wakiwaka, Makoto Sonehara, Toshiro Sato, Yoshimi Kikuchi
20th International Symposium on Applied Electromagnetics and Mechanics 2022 (ISEM2022), Jun. 2022

A basic study on anti-skid braking using cylindrical magnetrorheological fluid brakes
Takeshi Hikosaka, Makoto Sonehara, Tosiro Sato, Hiroyuki Wakiwaka, Yoshimi Kikuchi
20th International Symposium on Applied Electromagnetics and Mechanics 2022 (ISEM2022), Jun. 2022

Fabrication of iron-based amorphous spherical powder pressed magnetic core with low coercivity and low iron loss
Takanori Kanaya, Makoto Sonehara, Toshiro Sato
IEEE Shin-etsu Section Student Branch (SSB) Online Poster Session 2021, Dec. 2021

Basic investigation of planar power inductor for 15MHz switching DC-DC converter
Soichi Kimura, Makoto Sonehara, Toshiro Sato
IEEE Shin-etsu Section Student Branch (SSB) Online Poster Session 2021, Dec. 2021

Basic investigation of coupled-line EMI filter for beyond-MHz switching power supplies using high permeability and high loss magnetic material
Eiichi Yoshida, Makoto Sonehara, Toshiro Sato
IEEE Shin-etsu Section Student Branch (SSB) Online Poster Session 2021, Dec. 2021

Millimeter-Wave Electromagnetic Simulation for Conductive Paste Bonding Using Single Fullerene Shaped Model
Nozomi Shimoishizaka , Kousuke Hishida, Makoto Sonehara, Junpei Mochiduki, Toshiro Sato
EM-NANO2021 (The Eighth International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies), Toyama, Japan, Paper No.:P2-15, Jun. 2021

Basic investigation of LLC-LC resonant DC-DC converter using Fe-based metal composite bulk core transformer
Kozen Sato, Takayuki Denda, Takaaki Sako, Toshitaka Minamisawa, Toshiro Sato, Makoto Sonehara
International Magnetics Conference 2020 (INTERMAG2020), Montréal, Canada (cancelled due to COVID-19), Paper Number: BH-04, Apr. 2020

Fabrication of Fe-based soft magnetic flake powders for flake-composite magnetic sheet core
Yuan Ying, Yutaro Inagaki, Ryu Nomata, Makoto Sonehara, and Toshiro Sato
International Magnetics Conference 2020 (INTERMAG2020), Montréal, Canada (cancelled due to COVID-19), Paper Number: BS-09, Apr. 2020

Fundamental Study of Power Inductor with Carbonyl- Iron Powder/Epoxy Composite Magnetic Core for Several Hundred MHz Switching Convertor in POL Supply
Makoto Sonehara, Sota Yamaguchi, Toshiro Sato
International Magnetics Conference 2020 (INTERMAG2020), Montréal, Canada (cancelled due to COVID-19), Paper Number: GQ-13, Apr. 2020

Fe-based Composite Magnetic Core for GaN Power Device Switching Converter (Invited)
Toshiro Sato
International Symposium on Advanced Power Packaging 2019 (ISAPP2019), Osaka, Japan, Oct. 2019

Fe-based Metal composite Magnetic Core and Its Application to High-frequency Switching DC-DC Converter (Invited)
Toshiro Sato, Tsutomu Mizuno, Makoto Sonehara, Kousuke Miyaji, Tsuyoshi Funaki, Takaaki Ibuchi
2018 International Workshop on Power Supply On Chip, 4-1, NCTU, Hsinchu, Taiwan, Oct. 2018, IEEE Power Electronics Society

Fundamental Study on Eddy Current Braking Using DC/AC Excitaion Methods for Regional Jets
Norihiro Sato, Taichiro Sumi, Makoto Sonehara, Toshiro Sato, Hiroyuki Wakiwaka, Yoshimi Kikuchi
Asia-Pacific Symposium on Applied Electromagnetics and Mechanics (APSAEM 2018) , Yogyakarta, INDONESIA, Jul. 2018

Fundamental Study on Magnetorheological Fluid Brakes for Regional Jets
Taichiro Sumi, Norihiro Sato, Makoto Sonehara, Toshiro Sato, Hiroyuki Wakiwaka, Yoshimi Kikuchi
Asia-Pacific Symposium on Applied Electromagnetics and Mechanics (APSAEM 2018) , Yogyakarta, INDONESIA, Jul. 2018

Fabrication and evaluation of composite magnetic core using iron-based amorphous alloy powder with different particle-size distribution
Naoki Yabu, Kanako Sugimura, Yutaro Inagaki, Daiki Ueda, Makoto Sonehara, Toshiro Sato
International Magnetics Conference 2018 (INTERMAG2018), Singapore, Apr. 2018

Novel making method of high resistive surface layer of Fe-based amorphous powder by surface-modification using two-step acid solution process
Kanako Sugimura, Naoki Yabu, Makoto Sonehara, Toshiro Sato
International Magnetics Conference 2018 (INTERMAG2018), Singapore, Apr. 2018

Fabrication of ferromagnetic Co-MgF2 granular film with high transmittance and large Faraday-effect for optical magnetic field sensor
Mitsunori Miyamoto, Toshiya Kubo, Yuta Fujishiro, Kenta Shiota, Makoto Sonehara, Toshiro Sato
International Magnetics Conference 2018 (INTERMAG2018), Singapore, Apr. 2018

A 120dB-Ohm 16MHz Pseudo Differential CMOS Analog Front End Circuit for Optical Probe Current Sensor
Takaharu Uekura, Kousuke Oyanagi, Makoto Sonehara, Toshiro Sato, and Kousuke Miyaji
International Conference on Solid State Devices and Materials 2017 (SSDM2017), Sendai, Japan, Sep. 2017

Surface-oxidized amorphous alloy powder/epoxy resin composite bulk magnetic core and its application to MHz band switching LLC resonant converter
Kanako Sugimura, Daisuke Shibamoto, Tatsuya Yamamoto, Ryosuke Hirayama, Atsuya Ueno, Kelvin Lai Siong Ong, Naoki Yabu, Makoto Sonehara, Toshiro Sato, Tsutomu Mizuno, Hideaki Mizusaki
International Magnetics Conference 2017 (INTERMAG2017), Dublin, Ireland, Apr. 2017

Characterization of UHF band LC filter with RF spiral inductor using carbonyl-iron-particle/epoxy composite magnetic and chip capacitor
Makoto Sonehara, Yuki Miyajima, Sota Yamaguchi, Toshiro Sato
International Magnetics Conference 2017 (INTERMAG2017), Dublin, Ireland, Apr. 2017

LLC resonant converter using magnetocated wire and iron-based metal composite core
Tatsuya Yamamoto, Y. Konno, T. Dobashi, Kanako Sugimura, Toshiro Sato, Y. Bu, Tsutomu Mizuno
International Magnetics Conference 2017 (INTERMAG2017), Dublin, Ireland, Apr. 2017

Magnetic Properties of Ni-Zn Ferrite/Metal Composite Core in MHz Range
Satoshi Mori, Takeshi Mitsuoka, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita
61st Annual Conference on Magnetism and Magnetic Materials, New Orleans, LA, USA, Nov. 2016

Formation of high electrical-resistivity thin surface layer on Carbonyl-iron powder (CIP) and thermal stability of nanocrystalline structure and curling magnetic structure of CIP
Kanako Sugimura, Yuki Miyajima, Fumitaka Hayashi, Makoto Sonehara, Toshiro Sato, Nobuyuki Zettsu, Katsuya Teshima, Hideaki Mizusaki
MMM-Intermag 2016 Joint Conference, San Diego, CA, USA, Jan. 2016

Fundamental study of non-contact water salinity sensor by using electromagnetic means for seawater desalination plants
Nguyen Van Toai, Makoto Sonehara, Toshiro Sato
MMM-Intermag 2016 Joint Conference, San Diego, CA, USA, Jan. 2016

Surface-oxidized Carbonyl-iron powder/epoxy composite bulk magnetic core and its application to a MHz switching buck dc-dc converter
Kanako Sugimura, Atsuya Ueno, Daisuke Shibamoto, Kosuke Sato, Makoto Sonehara, Toshiro Sato
MMM-Intermag 2016 Joint Conference, San Diego, CA, USA, Jan. 2016

Q-factor increase of RF spiral inductor using composite magnetic core
Kazuaki Furihata, Jun Koguchi, Shingo Tanaka, Makoto Sonehara and Toshiro Sato
International Conference on Microwave Magnetics 2014 (ICMM2014), Sendai, Japan, Jul. 2014

Development of Simplified Quasi Transmission Line Thin Film Common Mode Filter With Air-Core Spiral Inductor and MIM Capacitors for Cell Phone
Yasuaki Yoshisaku，Ryuji Nakagomi, Yuki Watanabe, Hidetoshi Nakayama, Makoto Sonehara, Toshiro Sato
International Conference on Microwave Magnetics 2014 (ICMM2014), Sendai, Japan, Jul. 2014

Embedded planar power inductor in organic interposer for package-level DC power gird
Yuichiro Yazaki, Kazuma Ishidate, Kazuhiro Hagita, Yuta Kondo, Saki Hattori, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita, Tetsuro Watanabe, Yuto Seino
International Magnetics Conference 2014 (INTERMAG2014), Dresden, Germany, May 2014

Influence of Initial Surface Roughness on Severe Wear Volume for SUS304 Austenitic Stainless Steels
Akira Kawamura，Kazuyoshi Ishida，Katsuzo Okada, Toshiro Sato
International Conference on Tribology and Interface Engineering 2013 (ICTIE2013), Venezia, Italy, Nov. 2013

Zn-Co Substituted Ferrite Films Prepared by Solution Process
Tetsuro Watanabe, Kiminori Ushida, Kenichi Katsumata, Nobuhiro Matsushita, Kiyoshi Okada, Kazuhiro Hagita, Makoto Sonehara, Toshiro Sato
11th International Conference on Ferrites (ICF11), Okinawa, Japan, Apr. 2013

Efficiency Increase in On-Chip Buck Converter by Introduction of High Permeability Material to Inductor on Interposer
Hiroshi Fuketa, Yasuhiro Shinozuka, Koichi Ishida, Makoto Takamiya, Tomoharu Fujii, Hiroshi Shimizu, Kazutaka Kobayashi, Toshiro Sato, Takayasu Sakurai
11th International Conference on Ferrites (ICF11), Okinawa, Japan, Apr. 2013

Magnetic Properties of Spin-sprayed Ferrite Film Deposited on Glass/Epoxy Build-up Layer in Organic Interposer Substrate
Kazuhiro Hagita, Hiroki Kobayashi, Fumihiro Sato, Yuichiro Yazaki, Makoto Sonehara, Toshiro Sato, Tetsuro Watanabe, Nobuhiro Matsushita, Tomoharu Fujii, Hiroshi Shimizu, Kazutaka Kobayashi
11th International Conference on Ferrites (ICF11), Okinawa, Japan, Apr. 2013

Characterization of current sensor with variable sensitivity and measuring range using bias magnetic field of a hard magnetic film magnetized by pulsed-current method
Makoto Sonehara, Hiroki Kamada, Satoko Iida, Toshiro Sato
12th Joint MMM-Intermag Conference, Chicago, IL, USA, Jan. 2013

Carbonyl-iron/epoxy composite magnetic core for planar power inductor used in POL DC-DC converter for package-level power grid
Yuichiro Sugawa, Kazuma Ishidate, Makoto Sonehara, Toshiro Sato
12th Joint MMM-Intermag Conference, Chicago, IL, USA, Jan. 2013

Magnetic core power inductor embedded in plastic interposer toward power supply integrated in LSI package (Invited)
Toshiro Sato, Makoto Sonehara, Hiroki Kobayashi, Fumihiro Sato, Kazuhiro Hagita, Rie Takeda, Nobuhiro Matsushita, Tomohiro Fujii, Shinji Nakazawa, Hiroshi Shimizu, Kazutaka Kobayashi, Yasuhiro Shinozuka, Yuji Fuketa, Makoto Takamiya, Takayasu Sakurai
The 3rd. International Workshop on Power Supply on Chip 2012, San Francisco, CA, USA, Nov. 2012

Linearity evaluation for optical probe current sensor using the magnetic Kerr effect
Shin Suzuki, Hiroki Morisaki, Makoto Sonehara, Keisuke Ogawa, Toshiro Sato
International Conference of the Asian Union of Magnetic Societies 2012 (ICAUMS2012), Nara, Japan, Oct. 2012

A study of Zn-ferrite film planar power inductor embedded in LSI interposer for integrated power supply
Hiroki Kobayashi, Fumihiro Sato, Kazuhiro Hagita, Rie Takeda, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita, Kazutaka Kobayashi, Hiroshi Shimizu, Tomohiro Fujii, Koichi Ishida, Takayasu Sakurai
International Conference of the Asian Union of Magnetic Societies 2012 (ICAUMS2012), Nara, Japan, Oct. 2012

Development of Micro Magnetic Devices for High-Frequency Power Conversion and RF Applications (Invited)
Toshiro Sato, Makoto Sonehara, Kenji Ikeda, Hidetoshi Nakayama, Kazutaka Takizawa
2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS2012), Oct. 2012

A possibility of tunable soft magnetic inductive device using bias magnetic field of a hard magnetic film magnetized by pulsed-current method
Yosuke Obinata, Megumi Yuki, Makoto Sonehara, Yutaka Kuramoto, Kunihiko Suzuki, Kenji Ikeda, Toshiro Sato
International Conference on Microwave Magnetics 2012 (ICMM2012), Kaiserslautern, Germany, Aug. 2012

Relation between high-frequency properties and direction of anisotropy magnetic field in magnetic thin film for RF inductor
Makoto Sonehara, Toshiro Sato
International Magnetics Conference 2012 (INTERMAG2012), Vancouver, Canada, May 2012

A possibility of tunable soft magnetic inductive device using DC bias magnetic field of hard magnetic film magnetized by pulse current method
Megumi Yuki, Kenji Ikeda, Yutaka Kuramoto, Kunihiko Suzuki, Makoto Sonehara, Toshiro Sato
International Magnetics Conference 2012 (INTERMAG2012), Vancouver, Canada, May 2012

Increase of Q-factor of RF magnetic thin film inductor by introducing multi conductor line spiral coil and slit-patterned magnetic thin film
Takayuki Maruyama, Yosuke Obinata, Makoto Sonehara, Kenji Ikeda, Toshiro Sato
International Magnetics Conference 2011 (INTERMAG2011), Taipei, Taiwan, Apr. 2011

Fabrication of planar power inductor for embedded passives in LSI package for hundreds megahertz switching DC-DC buck converter
Hideyuki Ito, Asako Takeuchi, Shinya Okazaki, Hiroki Kobayashi, Yuichiro Sugawa, Akihiro Takeshima, Makoto Sonehara, Nobuhiro Matsushita, Toshiro Sato
International Magnetics Conference 2011 (INTERMAG2011), Taipei, Taiwan, Apr. 2011

Relation between high-frequency properties and angle of anisotropy magnetic field in magnetic thin film for spiral inductor
Makoto Sonehara, Keisuke Ogawa, Kenji Ikeda, Toshiro Sato
International Magnetics Conference 2011 (INTERMAG2011), Taipei, Taiwan, Apr. 2011

CoFeSiO/SiO2 Magnetic Thin Film Inductor for CSP RF-IC
Takayuki Maruyama, Megumi Yuki, Daisuke Kobayashi, Tomotake Minemura, Makoto Sonehara, Kenji Ikeda, Toshiro Sato
International Conference on Microwave Magnetics 2010 (ICMM2010), Boston, MA, USA, Jun. 2010

Development of Zn-Ferrite Thick Film Planar Power Inductor
Shinya Okazaki, Asako Takeuchi, Makoto Sonehara, Toshiro Sato, Nobuhiro Matsushita
International Conference on Microwave Magnetics 2010 (ICMM2010), Boston, MA, USA, Jun. 2010

Strain sensor using stress-magnetoresistance effect of Ni-Fe/Mn-Ir exchange-coupled magnetic film
T. Shinohara, M. Sonehara, T. Sato, K. Yamasawa, Y. Miura
11th Joint MMM-Intermag Conference, Washington DC, USA, Jan. 2010

Development of electromagnetic wave shielding textile by electroless Ni-based alloy plating
M. Sonehara，T. Sato，K. Yamasawa，Y. Miura
International Magnetics Conference 2009 (INTERMAG2009), Sacramento, CA, USA, May 2009

CoFeSiO/SiO2 multilayer granular film with very narrow ferromagnetic resonant linewidth
K. Ikeda, T. Suzuki, T. Sato
International Magnetics Conference 2009 (INTERMAG2009), Sacramento, CA, USA, May 2009

Cross-talk suppression in high density printed circuit board using magnetic composite filled in spacing between signal lines
S. Kayama, M. Sonehara，T. Sato，K. Yamasawa，Y. Miura
International Magnetics Conference 2009 (INTERMAG2009), Sacramento, CA, USA, May 2009

Experimental results on electromagnetic wave shielding using nano-fiber textile with metallic magnetic material
Makoto Sonehara，Toshiro Sato，Midori Takasaki，Hajime Konishi，Kiyohito Yamasawa，Yoshimasa Miura
6th International Workshop on High Frequency Micromagnetic Devices and Materials (MMDM2008), Madrid, Spain, May 2008

Suppression of Sm segregation and improvement of thermal stability by introducing Ru underlayer in Co-Sm amorphous films
Kenji Ikeda, Toshimasa Suzuki, Toshiro Sato
International Magnetics Conference 2008 (INTERMAG2008), Madrid, Spain, May 2008

Preparation and characterization of nano-fiber nonwoven textile for electromagnetic wave shielding
Makoto Sonehara，Toshiro Sato，Midori Takasaki，Hajime Konishi，Kiyohito Yamasawa，Yoshimasa Miura
International Magnetics Conference 2008 (INTERMAG2008), Madrid, Spain, May 2008

Fabrication of novel chip temperature sensing device using Mn substituted Li-Zn-Cu ferrite
Masayuki Naoe, Masayuki Oishi, Shinya Okazaki, Toshiro Sato, Kiyohito Yamasawa, Yoshimasa Miura
International Magnetics Conference 2008 (INTERMAG2008), Madrid, Spain, May 2008

Development of Integrated Magnetic Thin Film Devices for RF Applications (Invited)
T. Sato, M. Sonehara, K. Takizawa, H. Nakayama, K. Yamasawa, Y. Miura
2008 Asian Magnetics Conference, 2008, Invited

Basic Investigation of Micro Temperature Sensor by means of A Novel Transmission-Line Technique using A Temperature Sensing Li-Zn-Cu Ferrite Substrate
M. Naoe, R. Takahashi, T. Omura, Y. Hotta, T. Sato, K. Yamasawa, and Y. Miura
18th Soft Magnetic Materials Conference 2007, Cardiff, UK, Sep. 2007

Synthesis and characterization of Temperature Sensitive Li-Zn-Cu Ferrite
M. Naoe, T. Omura, T. Sato, K. Yamasawa, and Y. Miura
2007 International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2007), Nagano, Japan, Jun. 2007

Mn-Ir/Fe-Si exchange-coupled film and its microwave magnetic properties
M. Sonehara, K. Inagaki, T. Sato, K. Yamasawa, Y. Miura
2007 International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2007), Nagano, Japan, Jun. 2007

Fabrication of magnetic thin film directional coupler for mobile phones
K. Takizawa, M. Nakazawa, K. Sugiura, S. Mizuta, A. Hashimoto, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata, M. Yagi
5th International Workshop on High Frequency Micromagnetic Devices and Materials (MMDM5), Baltimore, MD, USA, Jan. 2007

Li-Zn-Cu ferrite for temperature sensing
M. Naoe, T. Omura, R. Takahashi, T. Sato, Y. Yamasawa, and Y. Miura
3rd Asia Forum on Magnetics, Matsue, Japan, Sep. 2006

Investigation of high frequency permeability of Mn-Ir/Fe-Si exchange-coupled film on the basis of micromagnetic simulator
M. Sonehara, T. Ishikawa, K. Inagaki, T. Sato, K. Yamasawa, Y. Miura, H. Fujiwara
3rd Asia Forum on Magnetics, Matsue, Japan, Sep. 2006

Temperature characteristics of the polycrystalline Li-Zn-Cu ferrite
M. Naoe, T. Omura, R. Takahashi, T. Sato, K. Yamasawa, and Y. Miura
International Conference on Magnetism (ICM2006), Kyoto, Japan, Aug. 2006

Fabrication and evaluation of the directional coupler using CoFeB metallic magnetic film/polyimide dielectric film hybrid transmission-line
K. Takizawa, S. Mizuta, M. Nakazawa, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata, M. Yagi
International Magnetics Conference 2006 (INTERMAG2006), San Diego, CA, USA, May 2006

Fabrication of an insulating type transmission-line transformer for high frequency inverter for discharge lamp
T. Miyazaki, A. Kikuchi, T. Sato, K. Yamasawa, Y. Miura
International Magnetics Conference 2006 (INTERMAG2006), San Diego, CA, USA, May 2006

Relation between microwave complex permeability and ferromagnetic Fe-Si layer thickness in Mn-Ir/Fe-Si exchange-coupled film
M. Sonehara, T. Sugiyama, T. Ishikawa, K. Inagaki, S. Ikeda, T. Sato, K. Yamasawa, Y. Miura
International Magnetics Conference 2006 (INTERMAG2006), San Diego, CA, USA, May 2006

Mn-Ir/Fe-Si exchange-coupled multilayer film with plural FMR absorptions for wideband noise filter
M. Sonehara, T. Ishikawa, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura
50th Conference on Magnetism and Magnetic Materials, San Jose, CA, USA, Nov. 2005

Suppression of insertion loss by slit-patterning of a magnetic film on a CoFeB/Polyimide hybrid thin-film coplanar-line for a RF impedance matching device
H. Nakayama, T. Yamamoto, Y. Mizoguchi, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata, M. Yagi
50th Conference on Magnetism and Magnetic Materials, San Jose, CA, USA, Nov. 2005

Latest activities on the high frequency micromagnetic devices and materials in Japan (invited)
Toshiro Sato
3rd International Workshop on High Frequency Micromagnetic Devices and Materials (MMDM3), Sendai, Japan, Apr. 2005

A coplanar-coupled-line common-mode filter using CoZrNb magnetic thin film for GHz frequency band
Y. Sudo, K. Watanabe, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara
International Magnetics Conference 2005 (INTERMAG2005), Nagoya, Japan, Apr. 2005

A planar inductor using Mn-Zn ferrite/polyimide composite thick film for low-voltage, large-current dc-dc converter
I. Kowase, T. Sato, K. Yamasawa, Y. Miura
International Magnetics Conference 2005 (INTERMAG2005), Nagoya, Japan, Apr. 2005

A thin film spiral microstrip transmission-line using CoZrNb soft magnetic thin film for a quarter wavelength transformer
H. Suzuki, N. Sugiyama, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara
International Magnetics Conference 2005 (INTERMAG2005), Nagoya, Japan, Apr. 2005

A wideband common-mode noise filter with a Mn-Zn ferrite and Cu/polyimide tape wound coil for switching power supplies used in electronic measuring instruments
K. Yanagisawa, F. Zhang, T. Sato, K. Yamasawa, Y. Miura
International Magnetics Conference 2005 (INTERMAG2005), Nagoya, Japan, Apr. 2005

Preparation and characterization of Mn-Ir/Fe-Si exchange-coupled multilayer film with Ru underlayer for high-frequency micromagnetic devices
M. Sonehara, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura
International Magnetics Conference 2005 (INTERMAG2005), Nagoya, Japan, Apr. 2005

FeSi/IrMn exchange coupled multilayer film with plural FMR absorptions
Makoto Sonehara, Toshiro Sato, Kiyohito Yamasawa, Yoshimasa Miura, Masahiro Yamaguchi
IUMRS-ICAM 2003, Yokohama, Japan, Oct. 2003

Magnetic thin film inductor for MHz switching dc-dc converter (invited)
Toshiro Sato
2rd International Workshop on High Frequency Micromagnetic Devices and Materials (MMDM2), Boston, MA, USA, Apr. 2003

Spiral type transmission line with a Mn-Zn ferrite core
Toshiro Sato, Kousuke Sato, Kiyohito Yamasawa, Fuchun Zhang, Koichi Yanagisawa
International Magnetics Conference 2003 (INTERMAG2003), Boston, MA, USA, Apr. 2003

A new multilayered common-mode filter on Ni-Zn ferrite substrate
T. Sato, S. Ikeda, Y. Hara, K. Yamasawa, T. Sakuma
8th Joint MMM-Intermag Conference, San Antonio, TX, USA, Jan. 2001

A novel transmission-line type high frequency transformer using a fine-grain Mn-Zn ferrite
T. Inoue, M. Furukawa, T. Sato, K. Yamasawa, T. Takahashi, Y. Sasaki, Y. Yamamoto, T. Hatanai, A. Makino
International Magnetics Conference 1999 (INTERMAG1999), Kyongju, Korea, May 1999

Sputter-deposited FeCoBC/AlNx multilayered film for wet-etching process
H. Tomita, T. Inoue, T. Mizoguchi, T. Sato
International Magnetics Conference 1999 (INTERMAG1999), Kyongju, Korea, May 1999

Frequency-modulation type magnetic field sensor using transmission-line magnetic device
S. Ikeda, T. Sato, K. Yamasawa
International Magnetics Conference 1999 (INTERMAG1999), Kyongju, Korea, May 1999

New applications of nanocrystalline Fe(Co-Fe)-Hf-O magnetic films to micromagnetic devices
T. Sato, Y. Miura, S. Matumura, K. Yamasawa, S. Morita, Y. Sasaki, T. Hatanai, A. Makino
7th Joint Intermag-MMM Conference, San Francisco, CA, USA, Jan. 1998

Application of nanocrystalline Fe (or Co-Fe)-Hf-O magnetic films with high electrical resistivity to micro DC-DC converters
T. Sato, E. Komai, K. Yamasawa, T. Hatanai, A. Makino
International Magnetics Conference 1997 (INTERMAG1997), New Orleans, LA, USA, Apr. 1997

Study of high power planar inductor
T. Sato, M. Hasegawa, T. Mizoguchi, M. Sahashi
5th Joint Intermag-MMM Conference, Pittsburgh, PA, USA, Jun. 1991

Discussion on eddy current loss under square wave voltage excitation
T. Sato, Y. Sakaki
4th Joint Intermag-MMM Conference, Vancouver, Canada, Jul. 1988

Very low loss ultrathin Co based amorphous ribbon cores
M. Yagi, T. Sato, Y. Sakaki, T. Sawa, K. Inomata
4th Joint Intermag-MMM Conference, Vancouver, Canada, Jul. 1988

100kHz - 10MHz iron loss measuring system
T. Sato, Y. Sakaki
International Magnetics Conference 1987 (INTERMAG1987), Tokyo, Japan, Apr. 1987

Large signal eddy current losses beyond 100kHz
Y. Sakaki, T. Sato
International Magnetics Conference 1984 (INTERMAG1984), Hamburg, Germany, Apr. 1984

A high frequency iron loss measuring system
T. Katane, T. Yamaguchi, T. Ito, T. Sato, Y. Sakaki
International Magnetics Conference 1984 (INTERMAG1984), Hamburg, Germany, Apr. 1984

Magnetic Society of Japan

Institute of Electrical Engineers of Japan

Institute of Electronics, Information and Communication Engineers of Japan

IEEE Magnetics Society

Hokuriku-Shinetsu Branch, Japanese Society for Engineering Education

The Japan Society of Applied Electromagnetics and Mechanics

Power Magnetics

Sensor Magnetics

Microwave Magnetics