K
Koki Takanashi
Researcher at Tohoku University
Publications - 513
Citations - 11822
Koki Takanashi is an academic researcher from Tohoku University. The author has contributed to research in topics: Magnetization & Magnetic anisotropy. The author has an hindex of 45, co-authored 489 publications receiving 10292 citations. Previous affiliations of Koki Takanashi include National Institute for Materials Science & Forschungszentrum Jülich.
Papers
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Transmission of electrical signals by spin-wave interconversion in a magnetic insulator
Y. Kajiwara,Kazuya Harii,Saburo Takahashi,Jun-ichiro Ohe,Ken-ichi Uchida,Masaki Mizuguchi,H. Umezawa,H. Kawai,Kazuya Ando,Kazuya Ando,Koki Takanashi,Sadamichi Maekawa,Eiji Saitoh,Eiji Saitoh,Eiji Saitoh +14 more
TL;DR: It is shown that a spin wave in an insulator can be generated and detected using spin-Hall effects, which enable the direct conversion of an electric signal into aspin wave, and its subsequent transmission through (and recovery from) an insulators over macroscopic distances.
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Future perspectives for spintronic devices
TL;DR: Spintronics is one of the emerging research fields in nanotechnology and has been growing very rapidly as mentioned in this paper, which has led to the discovery of giant magnetoresistance in 1988, which utilized spin-polarized electron transport across a non-magnetic metallic layer.
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Giant spin Hall effect in perpendicularly spin-polarized FePt/Au devices
Takeshi Seki,Yu Hasegawa,Seiji Mitani,Saburo Takahashi,Hiroshi Imamura,Sadamichi Maekawa,Junsaku Nitta,Koki Takanashi +7 more
TL;DR: This work presents a multi-terminal device with a Au Hall cross and an FePt perpendicular spin injector to detect giant direct and inverse SHEs at room temperature, enabling the unambiguous identification of SHEs.
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Enhanced magnetoresistance in insulating granular systems : evidence for higher-order tunneling
Seiji Mitani,Saburo Takahashi,Koki Takanashi,Kay Yakushiji,Sadamichi Maekawa,Hiroyasu Fujimori +5 more
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Preparation and magnetic properties of highly coercive FePt films
TL;DR: In this article, the magnetization processes of highly ordered FePt(001) films with large perpendicular magnetic anisotropy have been studied and a drastic change in the coercivity by one order of magnitude has been found at the critical thickness (tN=45 nm) where the film morphology changes from a particulate to a continuous state.