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｜Shinshu University Researcher List

YAMASAWA KIYOHITO

Faculty of Engineering　

Professor Emeritus　

Researcher Information

Degree

  • Doctor of Engineering

Field Of Study

  • Electron device and electronic equipment, 磁気デバイスの集積化（磁性体－半導体のハイブリッドICによるマイクロスイッチング電源の開発）

Educational Background

  • 1970, Tohoku University, Graduate School, Division of Engineering
  • 1968, Tohoku University, Faculty of Engineering
Research activity information

Paper

  • 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), 09E718-1, 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 Trans. Magn., 45(10), 4173, 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 Trans. Magn., 45(10), 4801, 2009
  • 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, 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, 20, 949, 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 Trans. Magn., 44(11), 2985, 2008
  • Preparation and characterization of nano-fiber nonwoven textile for electromagnetic wave shielding
    M. Sonehara, T. Sato, M. Takasaki, H..Konishi, K. Yamasawa, Y. Miura
    IEEE Trans. Magn., 44(11), 3107, 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, 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, 2007
  • 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 Trans. Magn., 42(10), 2984, 2006
  • Mn-Ir/Fe-Si exchange-coupled multilayer film with plural ferromagnetic resonance absorptions for wideband noise filter
    M. Sonehara, T. Ishikawa, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura
    JOURNAL OF APPLIED PHYSICS, 99, 08M309-1, 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
    H. Nakayama, T. Yamamoto, Y. Mizoguchi, M. Nakazawa, T. Sato, K. Yamasawa,Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata, M. Yagi
    JOURNAL OF APPLIED PHYSICS, 99, 08P508-1, 2006
  • 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 Trans. Magn., 41(10), 3511, 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 Trans. Magn., 41(10), 3571, 2005
  • A thin film spiral microstrip transmission-line using CoZrNb soft magnetic thins film for a quarter wavelength transformer
    H. Suzuki, N. Sugiyama, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara
    IEEE Trans. Magn., 41(10), 3574, 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 Trans. Magn., 41(10), 3991, 2005
  • 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, 2004
  • Spiral type transmission line with Mn-Zn ferrite core
    T.Sato, K.Sato, K.Yamasawa, F.Zhang, K.Yanagisawa
    IEEE Trans. Magn., 39(5), 3205, 2003
  • Amplitude modulation effect of dc-dc converter noise on CMOS logic signal transmission on microstrip PCB
    K.I.Nishijima, T.Sato, K.Yamasawa
    Proc. of the IEEE International Telecommun. Energy Conf. (INTELEC ’03), 510, 2003
  • A study on hybrid thin film microstrip line copmposed of CoZrNb metallic magnetic film and polyimide dielectric film
    T.Sato, S.Ikeda, K.Takizawa, K.Yamasawa
    2002 Asis-Paciffic Micr-wave Conference Proceedings, 602, 2002
  • Relation between power dissipation and signal transmission characteristic in CoZrNb/Polyimide hybrid microstrip line
    T.Sato, S.Ikeda, H.Nakayama, K.Takizawa, K.Yamasawa
    Trans. of the Magnetics Society of Japan, 2(5), 377, 2002
  • A new multilayered common-mode filter on Ni-Zn ferrite substrate
    T.Sato, S.Ikeda, Y.Hara, K.Yamasawa, T.Sakuma
    IEEE Trans. Magn., 37(4), 2900, 2001
  • A thin film type magnetic /dielectric hybrid transmission-line with a large wavelength shortning
    S.Ikeda, T.Sato, T.Oshiro, K.Yamasawa, T.Sakuma
    IEEE Trans. Magn., 37(4), 2903, 2001
  • A high sensitive multilayered parametric magnetic sensor
    K.Karasawa, H.Matsushima, T.Sato, K.Yamasawa, Y.Tanno
    Proc. of International Conf. on Electrical Engineering in Xi’an China(ICEE 2001), 3, 1677, 2001
  • A study of parametric models applied to in-service life prfediction of dry vacuum Pump
    A.Ishida, S.Konishi, T.Sato, K.Yamasawa
    Proc. of The IMACS Symp. on MATHMATICAL MODELLING, 1, 111, 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
    Proc. of the International Power Electronics Conference in Tokyo(IPEC-Tokyo 2000), 303, 2000
  • Thin film inducot for micro switching converters using a high resistive Fe-Zr-O film
    Y.Sasaki, E.Komai, T.Hatanai, T.Sato, K.Yamasawa
    Proc. of the International Power Electronics Conference in Tokyo(IPEC-Tokyo 2000), 315, 2000
  • A novel transmission-line type high frequency transformer using a fine-grain Mn-Zn ferrite
    T.Inoue, H.Furukawa, T.Sato, K.Yamasawa, T.Takahashi, Y.Sasaki, Y.Yamamoto, T.Hatanai, A.Makino
    IEEE Trans. Magn., 35(5), 3538, 1999
  • Frequency modulation type magnetic field sensor using transmission-line magnetic device
    Ikeda, TSato, K.Yamasawa
    IEEE Trans. Magn., 35(5), 3631, 1999
  • A new multilayered parametric magnetic sensor
    K.Karasawa, H.Matsushima, Y.Tanno, T.Sato, K.Yamasawa
    Proc. Magel’99, 319, 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
    Proc. Magel’99, 395, 1999
  • Device simulations of magnetic /di-electric hybrid transmission lines by using electromagnetic field analysis
    S.Ikeda, N.Shirai, K.Ito, A.Hirano, T.Sato, K.Yamasawa
    Proc. Magel’99, 399, 1999
  • The optimum chip size of a film reactor for a high efficiency operation of a micro DC-DC converter using planar inductor
    S.Sugahara, M.Endo, T.Sato, K.Yamasawa
    Record of IEEE PESC in Fukuoka, 1499, 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 IEEE PESC in Fukuoka, 1499, 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 IEEE PESC in Fukuoka, 1555, 1998
  • New applications of nanocrystalline Fe(Co-Fe)-Hf-O magnetic films to micromagnetic devices
    T.Sato, S.Matsumura, K.Yamasawa, S.Morita, Y.Sasaki, T.Hatanai, A.Makino
    J. Appl. Phys., 83(11), 6658, 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 Trans. Magn., 33(5-1), 3310, 1997
  • High frequency soft magnetic properties of nanocrystalline Fe(or Co-Fe)-Hf-O magnetic films with high electric 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, 1997
  • 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 Trans. Magn., 33(5), 3310, 1997
  • An experimental study of the operation of parametric magnetic reproducing head
    K. Karasawa, Y. Tanno, K. Yamasawa
    IEEE Trans. Magn., 32(5-1), 3500, 1996
  • A new non-repeated code type magnetic scale using a simple absolute head
    T. Mikoshiba, K. Yamasawa
    IEEE Trans. Magn., 32(5-2), 4938, 1996
  • Fundamental operations of a multipolar disk-solenoid
    H. Mutai, K. Yamasawa
    IEEE Trans. Magn., 31(4), 2445, 1995
  • A study of a new parametric magnetic reproducing head
    K. Karasawa, Y. Tanno, K. Yamasawa
    IEEE Trans. Magn., 31(6-1), 2678, 1995
  • Analysis of a Zero-Flux Type Current Sensor Using a Hall Element
    Y. Suzuki, K.Yamasawa, A. Hirayabayashi
    IEEE Translation Journal on Magnetics in Japan, 9(1), 165, 1994
  • An On-Board-Type Micro-Switching Converter with MHz Band-Operation
    K. Mizuguchi, K. Yamasawa
    IEEE Translation Journal on Magnetics in Japan, 9(2), 174, 1994
  • Estimation of the Characteristics of Multilayered and Conductor-Embedded Microtransformers by Magnetic Field Simulation
    H. Miyazaki, T. Hasegawa, K. Yamasawa
    IEEE Translation Journal on Magnetics in Japan, 9(3), 84, 1994
  • An evaluation of electromagnetic vibration of a squirrel-cage induction motor
    S.Onodera, K.Yamasawa
    J. Elect. Engrg. Slovok, 44(2), 56, 1993
  • Electromagnetic vibration analysis of a squirrel-cage induction motor
    S.Onodera, K.Yamasawa
    IEEE Trans. Magn., 29(6-2), 2410, 1993
  • Analysis of a zero-flux type current sensor
    Y.Suzuki, A.Hirabayashi, K.Yamasawa
    IEEE Trans. Magn., 29(6-2), 3183, 1993
  • A radial-force evaluation of a squirrel-cage induction motor
    S.Onodera, K.Yamasawa
    Proc 1st Japanese-Czecho-Slovok Joint Seminar on Appl. Electromag. Materials, (B1-5), 1992
  • An analysis of the operationof a disk-solenoid with a divided-coil excitation system
    H.Mutai, K.Yamasawa
    Proc 1st Japanese-Czecho-Slovok Joint Seminar on Appl. Electromag. Materials, (C2-2), 1992
  • Application of a new orthogonal-flux-type amorphous core to high-frequency inverters and three-phase measuring transformers
    K.Yamasawa, P.P.Biringer
    IEEE Trans. Magn., 26(3), 1198, 1990
  • High-frequency operation of a planar-type microtransformer and its application to Multilayered switching regulators
    K.Yamasawa, K.Maruyama, Y.Hirohama, P.P.Biringer
    IEEE Trans. Magn., 26(3), 1204, 1990
  • A proposal for finite element force approximation of an automotive magnetic actuator
    K.Yamasawa, S.Suzuki, P.P.Biringer
    IEEE Trans. Magn., 26(4), 1270, 1990
  • Graphical analysis of thermomagnetic actuator with hybrid excitation
    K.Yamasawa, P.P.Biringer
    IEEE Trans. Magn., 26(6), 3124, 1990
  • FEM analysis of a thermomagnetic linear actuator
    K.Yamasawa
    Proc of Bijin International Symp. on Electromagnetic fields in Electrical Engrg., 63, 1989
  • A new centrifugal switch using magnetic fluid
    Y.Kouzaki, H.Nakamura, K.Yamasawa
    J. Magn. & Materials, 65(2 & 3), 393, 1987
  • Planar-type micromagnetic core
    K.Yamasawa
    IEEE Trans. J. Magn. Japan, TJMJ-2(4), 323, 1987
  • A new thermomagnetic proximity sensor using a temperature-sensitive planar core
    H.Houjou, K.Yamasawa
    IEEE Trans. Magn., MAG-23(5), 2209, 1987
  • A new potential transformer using orthogonal flux-type amorphous core
    S.Iwahashi, K.Yamasawa
    IEEE Trans. J. Magn. Japan, TJMJ-1(5), 620, 1985
  • Peformance of temperature-sensitive magnetic actuators
    K.Yamasawa
    IEEE Trans. Magn., MAG-21(6), 2652, 1985
  • A new temperature sensor composed of electronic ceramcs with low Curie point
    K.Yamasawa, K.Matsumoto, M.Seki
    Proc of the 5th Sensor Symposium, 25, 1985
  • The operations of temperature-sensitive magnetic actuators
    K.Yamasawa, H.Takeyama
    Proc of the 4th Sensor Symposium, 47, 1984
  • Experimental considerations on a new automatic cooling device using temperature-sensitive magnetic fluid
    H.Matsuki, K. Yamasawa, K. Murakami
    IEEE Trans. Magn., MAG-13(5), 1143, 1977
  • Thermomagnetic characteristics of cores composed of temperature-sensitive magnetic materials
    K. Yamasawa, K. Murakami
    IEEE Trans. Magn., MAG-12(6), 801, 1976
  • A new magnetic amplifier utilizing temperature dependence of coercive force
    K. Yamasawa, K. Murakami
    IEEE Trans. Magn., MAG-12(6), 804, 1976
  • Experimental considerations on thermomagnetic characteristics of temperature-sensitive magnetic cores
    K. Yamasawa, K. Murakami
    IEEE Trans. Magn., MAG-10(3), 927, 1974

Affiliated academic society

  • IEEE