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).