K
Kensuke Kobayashi
Researcher at Osaka University
Publications - 191
Citations - 6186
Kensuke Kobayashi is an academic researcher from Osaka University. The author has contributed to research in topics: Magnetic field & Magnetoresistance. The author has an hindex of 36, co-authored 189 publications receiving 5643 citations. Previous affiliations of Kensuke Kobayashi include Institute for Creation Research & University of Tokyo.
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Journal ArticleDOI
Polarization Switching Ability Dependent on Multidomain Topology in a Uniaxial Organic Ferroelectric
Fumitaka Kagawa,Fumitaka Kagawa,Sachio Horiuchi,Nao Minami,Shoji Ishibashi,Kensuke Kobayashi,Reiji Kumai,Youichi Murakami,Yoshinori Tokura,Yoshinori Tokura +9 more
TL;DR: In this paper, the authors show that the topology of the multidomain structure can have an intrinsic impact on the degree of switchable polarization induced by electric fields, which is closely associated with the motions of the domain walls that separate regions with distinct polarization directions.
Journal ArticleDOI
Fluctuation theorem and microreversibility in a quantum coherent conductor
Shuji Nakamura,Yoshiaki Yamauchi,Masayuki Hashisaka,Kensaku Chida,Kensuke Kobayashi,Teruo Ono,Renaud Leturcq,Klaus Ensslin,Keiji Saito,Yasuhiro Utsumi,Arthur C. Gossard +10 more
TL;DR: In this paper, the electron exchange process via a quantum coherent conductor between two reservoirs is described, which yields the fluctuation theorem (FT) in mesoscopic transport, which is semiquantitatively validated in the current and noise measurement in an Aharonov-Bohm ring.
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Two-barrier stability that allows low-power operation in current-induced domain-wall motion.
Kab-Jin Kim,Ryo Hiramatsu,Tomohiro Koyama,Kohei Ueda,Yoko Yoshimura,Daichi Chiba,Daichi Chiba,Kensuke Kobayashi,Yoshinobu Nakatani,Shunsuke Fukami,Michihiko Yamanouchi,Hideo Ohno,Hiroshi Kohno,Gen Tatara,Teruo Ono +14 more
TL;DR: In this article, the authors show that current-induced intrinsic depinning has a different energy barrier than magnetic field-induced extrinsic depinning, and succeed in quantifying the respective barriers.
Journal ArticleDOI
Polarization Switching Ability Dependent on Multidomain Topology in a Uniaxial Organic Ferroelectric
Fumitaka Kagawa,Fumitaka Kagawa,Sachio Horiuchi,Nao Minami,Shoji Ishibashi,Kensuke Kobayashi,Reiji Kumai,Youichi Murakami,Yoshinori Tokura,Yoshinori Tokura +9 more
TL;DR: Using a combination of polarization hysteresis measurements and piezoresponse force microscopy on a uniaxial organic ferroelectric, α-6,6'-dimethyl-2,2'-bipyridinium chloranilate, it is shown that the topology of the multidomain structure can have an intrinsic impact on the degree of switchable polarization.
Journal ArticleDOI
Probing the spin polarization of current by soft x-ray imaging of current-induced magnetic vortex dynamics.
Shinya Kasai,Peter Fischer,Mi-Young Im,Keisuke Yamada,Yoshinobu Nakatani,Kensuke Kobayashi,Hiroshi Kohno,Teruo Ono +7 more
TL;DR: Time-resolved soft x-ray transmission microscopy is applied to image the current-induced resonant dynamics of the magnetic vortex core realized in a micron sized Permalloy disk and provides the spin polarization of the current to be 0.67+/-0.16 for Perm alloy.