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YAMASAWA KIYOHITO

Academic OrganizationTEL
Education and Research OrganizationFaculty of EngineeringFAX
PositionProfessorMail Address
Address3-1-1 Asahi, Matsumoto, Nagano 390-8621Web site

Modified:01/12/2016

Profile

Academic Societies
Academic Societies
IEEE
Academic Background
Graduate School
Tohoku University , (Graduate School, Division of Engineering) , 1970

College
Tohoku University , (Faculty of Engineering) , 1968

Degree
Doctor of Engineering

Research

Books, Articles, etc.
Articles
Strain sensor using stress-magnetoresistance effect of Ni-Fe/Mn-Ir exchange-coupled magnetic film
Journal of Applied Physics,107(9):09E718-1 2010
Author:M. Sonehara, T. Shinohara, T. Sato, K. Yamasawa, Y. Miura


Cross-talk suppression in high-density printed circuit boards using magnetic composite filled in spacing between signal lines,
IEEE Trans. Magn.,45(10):4801 2009
Author:S. Kayama, M. Sonehara, T. Sato, K. Yamasawa, Y. Miura


Development of an electromagnetic wave shielding textile by electroless Ni-based alloy plating
IEEE Trans. Magn.,45(10):4173 2009
Author:M. Sonehara, S. Noguchi, T. Kurashina, T. Sato, K. Yamasawa, Y. Miura


High efficiency PWM controlled micro DC-DC converter for portable electronic equipments
IEICE Transactions on Communications,E91-B(11):3704 2008
Author:S. Sugahara, K. Yamada, T. Kawashima, M. Edo, T. Sato, K. Yamasawa


Preparation and characterization of nano-fiber nonwoven textile for electromagnetic wave shielding
IEEE Trans. Magn.,44(11):3107 2008
Author:M. Sonehara, T. Sato, M. Takasaki, H..Konishi, K. Yamasawa, Y. Miura


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


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


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


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


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
Journal of Applied Physics,99:08P508-1 2006
Author:H. Nakayama, T. Yamamoto, Y. Mizoguchi, M. Nakazawa, T. Sato, K. Yamasawa,Y. Miura, Y. Miyake, M. Akie, Y. Uehara, M. Munakata, M. Yagi


Mn-Ir/Fe-Si exchange-coupled multilayer film with plural ferromagnetic resonance absorptions for wideband noise filter
Journal of Applied Physics,99:08M309-1 2006
Author:M. Sonehara, T. Ishikawa, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura


Relation between microwave complex permeability and ferromagnetic Fe-Si layer thickness in Mn-Ir/Fe-Si exchange-coupled film
IEEE Trans. Magn.,42(10):2984 2006
Author:M. Sonehara, T. Sugiyama, T. Ishikawa, K. Inagaki, T. Sato, K. Yamasawa,Y. Miura


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


A thin film spiral microstrip transmission-line using CoZrNb soft magnetic thins film for a quarter wavelength transformer
IEEE Trans. Magn.,41(10):3574 2005
Author:H. Suzuki, N. Sugiyama, T. Sato, K. Yamasawa, Y. Miura, Y. Miyake, M. Akie, Y. Uehara


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


Preparation and characterization of Mn-Ir/Fe-Si exchange-coupled multilayer film with Ru underlayer for high-frequency applications
IEEE Trans. Magn.,41(10):3511 2005
Author:M. Sonehara, T. Sugiyama, T. Sato, K. Yamasawa, Y. Miura


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


Amplitude modulation effect of dc-dc converter noise on CMOS logic signal transmission on microstrip PCB
Proc. of the IEEE International Telecommun. Energy Conf. (INTELEC ’03),:510 2003
Author:K.I.Nishijima, T.Sato, K.Yamasawa


Spiral type transmission line with Mn-Zn ferrite core
IEEE Trans. Magn.,39(5):3205 2003
Author:T.Sato, K.Sato, K.Yamasawa, F.Zhang, K.Yanagisawa


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


A study on hybrid thin film microstrip line copmposed of CoZrNb metallic magnetic film and polyimide dielectric film
2002 Asis-Paciffic Micr-wave Conference Proceedings,:602 2002
Author:T.Sato, S.Ikeda, K.Takizawa, K.Yamasawa


A high sensitive multilayered parametric magnetic sensor
Proc. of International Conf. on Electrical Engineering in Xi’an China(ICEE 2001),3:1677 2001
Author:K.Karasawa, H.Matsushima, T.Sato, K.Yamasawa, Y.Tanno


A thin film type magnetic /dielectric hybrid transmission-line with a large wavelength shortning
IEEE Trans. Magn.,37(4):2903 2001
Author:S.Ikeda, T.Sato, T.Oshiro, K.Yamasawa, T.Sakuma


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


Thin film inducot for micro switching converters using a high resistive Fe-Zr-O film
Proc. of the International Power Electronics Conference in Tokyo(IPEC-Tokyo 2000),:315 2000
Author:Y.Sasaki, E.Komai, T.Hatanai, T.Sato, K.Yamasawa


Planar power inductor using FeCoBN magnetic film with high saturation magnetization and high electrical resistivity
Proc. of the International Power Electronics Conference in Tokyo(IPEC-Tokyo 2000),:303 2000
Author:T.Sato, K.Yamasawa, H.Tomita, T.Inoue, T.Mizoguchi


A study of parametric models applied to in-service life prfediction of dry vacuum Pump
Proc. of The IMACS Symp. on MATHMATICAL MODELLING,1:111 2000
Author:A.Ishida, S.Konishi, T.Sato, K.Yamasawa


Device simulations of magnetic /di-electric hybrid transmission lines by using electromagnetic field analysis
Proc. Magel’99,:399 1999
Author:S.Ikeda, N.Shirai, K.Ito, A.Hirano, T.Sato, K.Yamasawa


A small and thin common mode choke composed of multilayered transformer structure with high coupling coefficient
Proc. Magel’99,:395 1999
Author:Y.Hara, T.Sato, K.Yamasawa, K.Toya, S.Kobayashi, T.Minamisawa


A new multilayered parametric magnetic sensor
Proc. Magel’99,:319 1999
Author:K.Karasawa, H.Matsushima, Y.Tanno, T.Sato, K.Yamasawa


Frequency modulation type magnetic field sensor using transmission-line magnetic device
IEEE Trans. Magn.,35(5):3631 1999
Author:Ikeda, TSato, K.Yamasawa


A novel transmission-line type high frequency transformer using a fine-grain Mn-Zn ferrite
IEEE Trans. Magn.,35(5):3538 1999
Author:T.Inoue, H.Furukawa, T.Sato, K.Yamasawa, T.Takahashi, Y.Sasaki, Y.Yamamoto, T.Hatanai, A.Makino


New applications of nanocrystalline Fe(Co-Fe)-Hf-O magnetic films to micromagnetic devices
J. Appl. Phys.,83(11):6658 1998
Author:T.Sato, S.Matsumura, K.Yamasawa, S.Morita, Y.Sasaki, T.Hatanai, A.Makino


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
Record of IEEE PESC in Fukuoka,:1555 1998
Author:Y.Sasaki, S.Morita, T.Hatanai, A.Makino, T.Sato, K.Yamasawa


A new multi-polar flat transformer and its application to a planar type DC/DC converter
Record of IEEE PESC in Fukuoka,:1499 1998
Author:T.Minamisawa, T.Sato, K.Yamasawa


The optimum chip size of a film reactor for a high efficiency operation of a micro DC-DC converter using planar inductor
Record of IEEE PESC in Fukuoka,:1499 1998
Author:S.Sugahara, M.Endo, T.Sato, K.Yamasawa


Application of nanocrystalline Fe(or Co-Fe)-Hf-O magnetic films with high electrical resistivity to micro dc-dc converters
IEEE Trans. Magn.,33(5):3310 1997
Author:T.Sato, E.Komai, K.Yamasawa, T.Hatanai, A.Makino


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
Nanostructured Materials,8(8):1025 1997
Author:Y.Sasaki, S.Morita, T.Hatanai, A.Makino, T.Sato, K.Yamasawa


Application of nanocrystalline Fe(or Co-Fe)-Hf-O magnetic films with high electrical resistivity to micro DC-DC converters
IEEE Trans. Magn.,33(5-1):3310 1997
Author:T. Sato, E. Komai, K. Yamasawa, T. Hatanai, A. Makino


A new non-repeated code type magnetic scale using a simple absolute head
IEEE Trans. Magn.,32(5-2):4938 1996
Author:T. Mikoshiba, K. Yamasawa


An experimental study of the operation of parametric magnetic reproducing head
IEEE Trans. Magn.,32(5-1):3500 1996
Author:K. Karasawa, Y. Tanno, K. Yamasawa


A study of a new parametric magnetic reproducing head
IEEE Trans. Magn.,31(6-1):2678 1995
Author:K. Karasawa, Y. Tanno, K. Yamasawa


Fundamental operations of a multipolar disk-solenoid
IEEE Trans. Magn.,31(4):2445 1995
Author:H. Mutai, K. Yamasawa


Estimation of the Characteristics of Multilayered and Conductor-Embedded Microtransformers by Magnetic Field Simulation
IEEE Translation Journal on Magnetics in Japan,9(3):84 1994
Author:H. Miyazaki, T. Hasegawa, K. Yamasawa


An On-Board-Type Micro-Switching Converter with MHz Band-Operation
IEEE Translation Journal on Magnetics in Japan,9(2):174 1994
Author:K. Mizuguchi, K. Yamasawa


Analysis of a Zero-Flux Type Current Sensor Using a Hall Element
IEEE Translation Journal on Magnetics in Japan,9(1):165 1994
Author:Y. Suzuki, K.Yamasawa, A. Hirayabayashi


Analysis of a zero-flux type current sensor
IEEE Trans. Magn.,29(6-2):3183 1993
Author:Y.Suzuki, A.Hirabayashi, K.Yamasawa


Electromagnetic vibration analysis of a squirrel-cage induction motor
IEEE Trans. Magn.,29(6-2):2410 1993
Author:S.Onodera, K.Yamasawa


An evaluation of electromagnetic vibration of a squirrel-cage induction motor
J. Elect. Engrg. Slovok,44(2):56 1993
Author:S.Onodera, K.Yamasawa


An analysis of the operationof a disk-solenoid with a divided-coil excitation system
Proc 1st Japanese-Czecho-Slovok Joint Seminar on Appl. Electromag. Materials,(C2-2) 1992
Author:H.Mutai, K.Yamasawa


A radial-force evaluation of a squirrel-cage induction motor
Proc 1st Japanese-Czecho-Slovok Joint Seminar on Appl. Electromag. Materials,(B1-5) 1992
Author:S.Onodera, K.Yamasawa


Graphical analysis of thermomagnetic actuator with hybrid excitation
IEEE Trans. Magn.,26(6):3124 1990
Author:K.Yamasawa, P.P.Biringer


A proposal for finite element force approximation of an automotive magnetic actuator
IEEE Trans. Magn.,26(4):1270 1990
Author:K.Yamasawa, S.Suzuki, P.P.Biringer


High-frequency operation of a planar-type microtransformer and its application to Multilayered switching regulators
IEEE Trans. Magn.,26(3):1204 1990
Author:K.Yamasawa, K.Maruyama, Y.Hirohama, P.P.Biringer


Application of a new orthogonal-flux-type amorphous core to high-frequency inverters and three-phase measuring transformers
IEEE Trans. Magn.,26(3):1198 1990
Author:K.Yamasawa, P.P.Biringer


FEM analysis of a thermomagnetic linear actuator
Proc of Bijin International Symp. on Electromagnetic fields in Electrical Engrg.,:63 1989
Author:K.Yamasawa


A new thermomagnetic proximity sensor using a temperature-sensitive planar core
IEEE Trans. Magn.,MAG-23(5):2209 1987
Author:H.Houjou, K.Yamasawa


Planar-type micromagnetic core
IEEE Trans. J. Magn. Japan,TJMJ-2(4):323 1987
Author:K.Yamasawa


A new centrifugal switch using magnetic fluid
J. Magn. & Materials,65(2 & 3):393 1987
Author:Y.Kouzaki, H.Nakamura, K.Yamasawa


A new temperature sensor composed of electronic ceramcs with low Curie point
Proc of the 5th Sensor Symposium,:25 1985
Author:K.Yamasawa, K.Matsumoto, M.Seki


Peformance of temperature-sensitive magnetic actuators
IEEE Trans. Magn.,MAG-21(6):2652 1985
Author:K.Yamasawa


A new potential transformer using orthogonal flux-type amorphous core
IEEE Trans. J. Magn. Japan,TJMJ-1(5):620 1985
Author:S.Iwahashi, K.Yamasawa


The operations of temperature-sensitive magnetic actuators
Proc of the 4th Sensor Symposium,:47 1984
Author:K.Yamasawa, H.Takeyama


Experimental considerations on a new automatic cooling device using temperature-sensitive magnetic fluid
IEEE Trans. Magn.,MAG-13(5):1143 1977
Author:H.Matsuki, K. Yamasawa, K. Murakami


A new magnetic amplifier utilizing temperature dependence of coercive force
IEEE Trans. Magn.,MAG-12(6):804 1976
Author:K. Yamasawa, K. Murakami


Thermomagnetic characteristics of cores composed of temperature-sensitive magnetic materials
IEEE Trans. Magn.,MAG-12(6):801 1976
Author:K. Yamasawa, K. Murakami


Experimental considerations on thermomagnetic characteristics of temperature-sensitive magnetic cores
IEEE Trans. Magn.,MAG-10(3):927 1974
Author:K. Yamasawa, K. Murakami