Japanese

book

Research Activities

  In Department of Physics, Click here


[In INAMORI Frontier Research Center]   [Before working in IFRC]

Publication

S. Bakaul, S. Hu and T. Kimura:
"Large pure spin current generation in metallic nanostructures." (Invited)
Appl. Phys. A 111, 355 (2013).

S. Hu and T. Kimura:
"Anomalous Nernst-Ettingshausen effect in nonlocal spin valve measurement under high-bias current injection."
Phys. Rev. B 87, 014424 (2013).

K. Kiseki, S. Yakata and T. Kimura:
"Efficient excitation and detection of standing spin wave in Permalloy film -Demonstration of spin wave resonator-."
Appl. Phys. Lett. 101, 212404 (2012).

S. Oki, K. Masaki, N. Hashimoto, S. Yamada, M. Miyata, M. Miyao, T. Kimura and K. Hamaya:
"Sign determination of spin polarization in L21 ordered Co2FeSi using a Pt-based spin Hall device."
Phys. Rev. B 86, 174412 (2012).

S. Bakaul, W. Hu, T. Wu and T. Kimura:
"Intrinsic domain-wall resistivity in half-metallic manganite thin films."
Phys. Rev. B 86, 184404 (2012)

S. Hu, K. Kiseki, S. Yakata and T. Kimura:
"Ferromagnetic resonance in exchange-coupled NiFe/FeMn films and its control."
IEEE Trans. Magn. 48, 2889 (2012).

K. Nakada, S. Yakata and T. Kimura:
"Noise-induced Transition of Mutual Phase Synchronization in Coupled Spin Torque Nano Oscillators."
IEEE Trans. Magn. 48, 4558 (2012).

S. Nonoguchi, T. Nomura and T. Kimura:
"Longitudinal and transverse spin current absorptions in a lateral spin valve structure."
Phys. Rev. B 86, 104417 (2012).

K. Ienaga, N. Nakashima, Y. Inagaki, H. Tsujii, S. Honda, T. Kimura and T. Kawae:
"Zero-bias anomaly in ferromagnetic Ni nanoconstrictions."
Phys. Rev. B 86, 064404 (2012).

T. Nomura, S. Nonoguchi and T. Kimura:
"Efficient inducement of bistable spin Hall effect using in-plane-magnetized V-shaped ferromagnetic wire."
Appl. Phys. Lett. 101, 082403 (2012).

T. Matsunaga, M. Hidegara, K. Furukawa, M. Hara, T. Nomura and T. Kimura:
"Optimization of magnetic-field response of bend resistance in ballistic two-dimensional electron gas."
Appl. Phys. Exp. 5, 073001 (2012).

S. Oki, S. Yamada, N. Hashimoto, M. Miyao, T. Kimura and K. Hamaya:
"Effect of Addition of Al to Single-Crystalline CoFe Electrodes on Nonlocal Spin Signals in Lateral Spin-Valve Devices."
Appl. Phys. Exp. 5, 063004 (2012).

K. Fukumoto, K. Arai, T. Kimura, Y. Otani and T. Kinoshita:
"Nonlinear motion of magnetic vortex cores during fast magnetic pulses."
Phys. Rev. B 85, 134414 (2012).

S. Nonoguchi, T. Nomura and T. Kimura:
"Nonlocal spin transports in nanopillar-based lateral spin valve."
Appl. Phys. Lett. 100, 132401 (2012).

K. Hamaya, N. Hashimoto, S. Oki, S. Yamada, M. Miyao and T. Kimura:
"Estimation of the spin polarization for Heusler-compound thin films by means of nonlocal spin-valve measurements: Comparison of Co2FeSi and Fe3Si."
Phys. Rev. B 85, 100404(R) (2012).

T. Kimura, N. Hashimoto, S. Yamada, M. Miyao and K. Hamaya:
"Room-temperature generation of giant pure spin currents using Co2FeSi spin injectors."
NPG Asia Mater. 4, e9 (2012).

K. Nakada, S. Yakata and T. Kimura:
"Noise-induced synchronization in spin torque nano oscillators."
J. Appl. Phys. 111, 07C920 (2012).

S. Nonoguchi, T. Nomura, Y. Ando and T. Kimura:
"Electrical manipulation of spin polarization and generation of giant spin current using multi terminal spin injectors."
J. Appl. Phys. 111, 07C505 (2012).

M. Miyata, K. Kiseki, S. Yakata, H. Wada and T. Kimura:
"Formations of magnetic vortices in a chain array of triangle Py dots and an isosceles triangle Py dot."
J. Appl. Phys. 111, 07B902 (2012).

S. Yakata, M. Miyata, S. Honda, H. Itoh, H. Wada and T. Kimura:
"Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field."
Appl. Phys. Lett. 99, 242507 (2011).

S. Nonoguchi, Y. Ando, S. Yakata and T. Kimura:
"Transport properties of pure spin currents in a polycrystalline Gd wire."
IEEE Trans. Magn. 47, 2750 (2011).

M. Miyata, S. Nonoguchi, S. Yakata, H. Wada and T. Kimura:
"Static and dynamical properties of a magnetic vortex in a regular polygonal nanomagnet."
IEEE Trans. Magn. 47, 2505 (2011).

Y. Togawa, T. Kimura, K. Harada, A. Tonomura and Y. Otani:
"Control of magnetic domain wall displacement using spin current in small in-plane magnetic field in Permalloy nanowires."
J. Phys. D: Appl. Phys. 44, 064015 (2011)

Y. Otani and T. Kimura:
"Manipulation of spin currents in metallic systems."
Phil. Trans. R. Soc. A 369, 3136 (2011).

P. Laczkowski, L. Vila, S. Ferry, A. Marty, J-M. George, H. Jaffres, A. Albert, T. Kimura, T. Yang, Y. Otani, J-P. Attane:
"Spin signal in metallic lateral spin valves made by a multiple angle evaporation technique."
Appl. Phys. Exp. 4, 063007 (2011).

M. Morota, Y. Niimi, K. Ohnishi, D. H. Wei, T. Tanaka, H. Kontani, T. Kimura and Y. Otani:
"Indication of intrinsic spin Hall effect in 4d and 5d transition metals."
Phys. Rev. B 83, 174405 (2011).

K. Arai, T. Okuda, K. Fukumoto, T. Ohkouchi, K. Kodama, T. Kimura, Y. Haruyama, T. Nakamura, T. Matsushita, H. Osawa, T. Muro, S. Matsui, A. Kakizaki, Y. Otani and T. Kinoshita:
"Dynamics of magnetostatically coupled vortices observed by time-resolved photoemission electron microscopy."
Jpn. J. Appl. Phys. 50, 053001 (2011).

S. Sugimoto, Y. Fukuma, S. Kasai, T. Kimura, A. Barman and Y. Otani:
"Dynamics of coupled vortices in a pair of ferromagnetic disks."
Phys. Rev. Lett. 106, 197203 (2011).

M. Miyata, S. Yakata, T. Kimura and H. Wada:
"Control of Magnetic Vortex Chirality in a Regular Pentagonal Permalloy Nanomagnet Using In-plane Magnetic Field."
J. Magn. Soc. Jpn. 35, 216 (2011).

Y. Otani and T. Kimura:
"Spin current related phenomena in metallic nano-structures."
Physica E: Low-dimensional Systems and Nanostructures 43, 735 (2011).

Y. Togawa, T. Kimura, K. Harada, A. Tonomura and Y. Otani:
"Stochastic nature of current-excited magnetic domain and domain wall dynamics microscopically investigated by Lorentz microscopy."
TENCON 2010 - 2010 IEEE Region 10 Conference, 122 (2010).

S. Yakata, Y. Ando and T. Kimura:
"Optimization of interface condition for efficient spin injection in Permalloy/Cu lateral spin valve."
TENCON 2010 - 2010 IEEE Region 10 Conference, 126 (2010).

S. Nonoguchi, Y. Ando, Y. Togawa and T. Kimura:
"Spin transport properties in polycrystalline Gd film and strip."
TENCON 2010 - 2010 IEEE Region 10 Conference, 1881 (2010).

M. Miyata, S. Yakata, M. Hara, H. Wada and T. Kimura:
"Control of vortex chirality in polygonal nanomagnets."
TENCON 2010 - 2010 IEEE Region 10 Conference, 1878 (2010).

Y. Ando, K. Kasahara, K. Yamane, K. Hamaya, K. Sawano, T. Kimura and M. Miyao:
"Comparison of nonlocal and local magnetoresistance signals in laterally fabricated Fe3Si/Si spin-valve devices."
Appl. Phys. Exp. 3, 093001 (2010).

Y. Ando, K. Kasahara, Y. Enomoto, T. Murakami, K. Hamaya, T. Kimura, K. Sawano and M. Miyao:
"Electrical detection of spin transport in Si using high-quality Fe3Si/Si schottky tunnel contacts."
J. Magn. Soc. Jpn. 34, 316 (2010).

K. Ohnishi, T. Kimura and Y. Otani:
"Nonlocal injection of spin current into a superconducting Nb wire."
Appl. Phys. Lett. 96, 192509 (2010).

Y. Togawa, K. Takayanagi, T. Kimura, K. Harada, T. Akashi, A. Tonomura, S. Mori and Y. Otani:
"Crystalline analysis of permalloy narrow wires subject to current pulses."
J. Appl. Phys. 107, 09A326 (2010).

T. Kimura and M. Hara:
"Nonvolatile multiple-valued memory device using lateral spin valve."
Appl. Phys. Lett. 97, 182501 (2010).

S. Yakata, M. Miyata, S. Nonoguchi, H. Wada and T. Kimura:
"Control of vortex chirality in regular polygonal nanomagnets using in-plane magnetic field."
Appl. Phys. Lett. 97, 222503 (2010).

Y. Togawa, T. Kimura, K. Harada, T. Akashi, A. Tonomura and Y. Otani:
"Magnetization Dynamics under Spin Current." (Invited)
Jpn. Soc. Microscopy 45, (2010).

A. Barman, H. Sakata, T. Kimura, Y. Otani and Y. Fukuma
"Coherent suppression of picosecond magnetization precession in the presence of spin waves in a NiFe microstripe."
J. Appl. Phys. 106, 043906 (2009).

J. B. Laloe, T. Yang, T. Kimura and Y. Otani:
"Spin-dependent transport in a nanopillar non-local spin valve."
J. Magn. Magn. Mater. 321, 3829 (2009).

A. Barman, H. Sakata, T. Kimura, Y. Otani and Y. Fukuma:
"Coherent suppression of magnetization precession in presence of spin waves in a NiFe microwire."
IEEE Trans. Magn. 45, 4104 (2009).

M. Morota, K. Ohnishi, T. Kimura and Y. Otani:
"Spin Hall effect in Molybdenum wires."
J. Appl. Phys. 105, 07C712 (2009).

J. B. Laloe, T. Yang, T. Kimura and Y. Otani:
"Spin-current-induced dynamics in ferromagnetic nanopillars of lateral spin-valve structures."
J. Appl. Phys. 105, 07D110 (2009).


Presentation

S. Nonoguchi, T. Nomura, T. Matsunaga K. Furukawa, M. Hara and T. Kimura:
"Magnetic and transport properties of submicron Gd strip."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

S. Yakata, M. Miyata, K. Kiseki, H. Wada and T. Kimura:
"Position dependence of vortex core oscillation in polygonal nanomagnets."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

T. Kimura, S. Oki, S. Yamada M. Miyao and K. Hamaya:
" Pure spin current generation using highly spin polarized Co2FeSi electrodes."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

S. Nonoguchi, T. Nomura and T. Kimura:
" Pure spin current injection into a Gd wire"
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

S. Honda, H. Itoh, S. Yakata and T. Kimura:
" Micromagnetic simulation for controlling the magnetic vortex chirality by current-induced Oersted field."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

S. Hu, T. Nomura, S. Nonoguchi and T. Kimura:
"Improvement of generation efficiency of pure spin current using multi-terminal spin injection."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

K. Kiseki, S. Yakata and T. Kimura:
"Giant spin accumulation at room temperature in Co2FeSi/Cu lateral spin valves."
Internatinal Conference on Magnetics 2012, Busan, Korea (July 2012).

S. Yakata, M. Miyata, K. Kiseki, H. Wada and T. Kimura:
"Formation of double vortices and reconfigurable dynamic properties using an isosceles-triangular Py nanodot."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

T. Nomura, S. Nonoguchi and T. Kimura:
" Detection of pure spin current using a nonlocal loop circuit."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

K. Nakada, S. Yakata and T. Kimura:
"Noise-induced transition of mutual phase synchronization in spin torque nano oscillators."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

S. Nonoguchi, T. Nomura and T. Kimura:
"Generation of pure spin current using nano-pillar-based lateral spin valve."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

K. Kiseki, S. Hu, S. Yakata and T. Kimura:
"Possibility for ferromagnetic resonance control using exchange-coupled NiFe/FeMn film."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

K. Kiseki, M. Miyata, S. Yakata and T. Kimura:
"Generation of standing spin wave excitations using ladder- and comb-type electrodes."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

S. Oki, N. Hashimoto, S. Yamada, T. Kimura, M. Miyao and K. Hamaya:
"Inhomogeneous standing spin wave excited by the patterned periodic electrode."
IEEE International Magnetics Conference, Vancouver, Canada (May 2012).

K. Nakada, S. Yakata and T. Kimura:
"Noise-induced Synchronization in Spin Torque Nano Oscillators."
56th Annual Conference on Magnetism and Magnetic Materials, Arizona, USA (October 2011).

T. Nomura, S. Nonoguchi, Y. Ando and T. Kimura:
"Detection of a loop current created by a pure spin current."
56th Annual Conference on Magnetism and Magnetic Materials, Arizona, USA (October 2011).

S. Nonoguchi, T. Nomura, Y. Ando and T. Kimura:
"Generation of giant spin current using multi-terminal nonlocal spin injections."
56th Annual Conference on Magnetism and Magnetic Materials, Arizona, USA (October 2011).

M. Miyata, S. Yakata, H. Wada and T. Kimura:
"Magnetic properties of double vortices stabilized in isosceles triangular ferromagnetic dots."
56th Annual Conference on Magnetism and Magnetic Materials, Arizona, USA (October 2011).

K. Nakada, S. Yakata and T. Kimura:
"Stochastic state transition of a spin torque nano oscillator."
International Conference on Solid State Devices and Materials, Aichi, Japan (September 2011).

K. Ienaga, T. Kawae, H. Tsujii and T. Kimura:
"Magnetic impurity scattering in atomic sized contact."
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

N. Hashimoto, K. Masaki,S. Oki, S. Yamada, T. Kimura, M. Miyao and K. Hamaya:
"Electrical detection of a pure spin current in lateral devices with single-crystalline Co2FeSi electrodes."
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

S. Nonoguchi, Y. Ando, S. Yakata and T. Kimura:
"Pure spin current injection into polycrystalline Gd."
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

S. Nonoguchi, Y. Ando, S. Yakata and T. Kimura:
"Efficient manipulations of pure spin currents using V-shape ferromagnetic wires"
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

M. Miyata, S. Yakata, H. Wada and T. Kimura:
"Control of vortex chirality using DC current injection."
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

M. Miyata, K. Kiseki, S. Yakata, H. Wada and T. Kimura:
"Electrical detection of vortex core polarity in a polygonal nanomagnet."
6th International School and Conference on Spintronics and Quantum Information Technology (SPINTECH6), Matsue, Japan (August 2011).

K. Masaki, N. Hashimoto, S. Oki, S. Yamada, T. Kimura, M. Miyao and K. Hamaya:
"Electrical detection of spin Hall effect in Co2FeSi/Cu/Pt lateral device structures."
5th International Workshop on Spin Currents, Sendai, Japan (August 2011).

S. Honda, H. Itoh, S. Yakata and T. Kimura:
"Micromagnetic simulation for the control of the magnetic vortex chirality."
5th International Workshop on Spin Currents, Sendai, Japan (August 2011).

S. Nonoguchi, Y. Ando, S. Yakata and T. Kimura:
"Transport properties of pure spin currents in a polycrystalline Gd wire."
International Magnetic Conference 2011 (Intermag2011), Taipei, Taiwan (April 2011).

M. Miyata, S. Nonoguchi, S. Yakata, H. Wada and T. Kimura:
"Static and dynamic properties of a magnetic vortex in a regular polygonal nanomagnet."
International Magnetic Conference 2011 (Intermag2011), Taipei, Taiwan (April 2011).

S. Yakata, Y. Ando and T. Kimura:
"Optimization of cleaning condition of Permalloy/Cu interface for efficient spin injection."
2010 IEEE Region 10 Conference (TENCON2010), Fukuoka, Japan (November 2010).

S. Nonoguchi, Y. Ando, Y. Togawa and T. Kimura:
"Spin transport properties in polycrystalline Gd film and strip."
2010 IEEE Region 10 Conference (TENCON2010), Fukuoka, Japan (November 2010).

M. Miyata, S. Yakata, M. Hara, H. Wada and T. Kimura:
"Control of vortex chirality in polygonal nanomagnets."
2010 IEEE Region 10 Conference (TENCON2010), Fukuoka, Japan (November 2010).

Y. Ando, K. Kasahara, K. Yamane, K. Hamaya, K. Sawano, T. Kimura and M. Miyao:
"Nonlocal detection of spin transport in silicon using a Co/Fe3Si injector and an Fe3Si detector."
6th International Conference on the Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS-VI), Tokyo, Japan (August 2010).

S. Yakata, H. Kubota, T. Seki, K. Yakushiji, A. Fukushima, S. Yuasa and K. Ando:
"Thermal stability and switching current of ferromagnetically coupled CoFeB/Ru/CoFeB synthetic free layer."
2nd international symposium on advanced magnetic materials and applications (ISAMMA2010), Sendai, Japan (July 2010).

A. Barman, S. Barman, T. Kimura, Y. Fukuma and Y. Otani:
"Gyrotropic mode splitting in pair of magnetostatically coupled Permalloy disks in an ordered array."
Progress in Electromagnetics Research Symposium 2010 (PIERS2010), Cambridge, USA (July 2010).

K. Ohnishi, T. Kimura and Y. Otani:
"Non-local spin current injection into a superconducting Nb wire."
Condensed Matter Group, Leeds, UK (March 2010).

K. Ohnishi, T. Kimura and Y. Otani:
"Pure spin current injection into a superconducting wire."
International Conference on Superconductivity and Magnetism 2010 (ICSM2010), Antalya, Turkey (April 2010)

Y. Ando, K. Kasahara, Y. Enomoto, K. Yamane, K. Hamaya, K. Sawano, T. Kimura and M. Miyao:
"Nonlocal voltage detection of spin transport in silicon via Fe3Si/Si Schottky tunnel contacts."
11th Joint MMM/Intermag Conference (MMM/Intermag 2010), Washinton DC, USA (January 2010).

K. Arai, T. Okuda, K. Fukumoto, M .Kotsugi, K. Kodama, T. Ohkouchi, T. Kimura, H. Osawa, T. Nakamura, T. Matsushita, T. Muro, A. Kakizaki, Y. Otani and T. Kinoshita:
"Observation of mesoscopic magnetic vortex dynamics by photoemission electron microscopy."
11th International Conference on Electronic Spectroscopy and Structure (ICESS11), Nara, Japan (December 2009).

A. Barman, T. Kimura, Y. Otani and Y. Fukuma:
"Coherent suppression of magnetization precession in presence of spin waves in a Ni81Fe19 microwire."
International Magnetic Conference 2009 (Intermag2009), Sacramento, USA (May 2009).

A. Barman, T. Kimura, Y. Otani, Y. Fukuma, K. Akahane, S. Meguro and S. Sugasawara:
"Bench-top time-resolved magneto-optical Kerr magnetometer."
International Magnetic Conference 2009 (Intermag2009), Sacramento, USA (May 2009).

K. Ohnishi, T. Kimura and Y. Otani::
"Pure spin current injection through superconductive/normal metal ohmic interface"
OIST Workshop, Okinawa, Japan (March 2009).