K
Kohei Ueda
Researcher at Massachusetts Institute of Technology
Publications - 23
Citations - 1588
Kohei Ueda is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Magnetic domain & Magnetization. The author has an hindex of 15, co-authored 22 publications receiving 1272 citations. Previous affiliations of Kohei Ueda include Kyoto University.
Papers
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Journal ArticleDOI
Fast current-driven domain walls and small skyrmions in a compensated ferrimagnet.
Lucas Caretta,Maxwell Mann,Felix Büttner,Kohei Ueda,Bastian Pfau,Christian M. Günther,Piet Hessing,Alexandra Churikova,Christopher Klose,Michael Schneider,Dieter Engel,Colin Marcus,David Bono,Kai Bagschik,Stefan Eisebitt,Geoffrey S. D. Beach +15 more
TL;DR: This work shows that high-speed, high-density spintronics devices based on current-driven spin textures can be realized using materials in which TA and TM are close together using compensated ferrimagnets.
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Observation of the intrinsic pinning of a magnetic domain wall in a ferromagnetic nanowire
Tomohiro Koyama,Daichi Chiba,Daichi Chiba,Kohei Ueda,Kouta Kondou,Hironobu Tanigawa,Shunsuke Fukami,Teruaki Suzuki,Norikazu Ohshima,Nobuyuki Ishiwata,Yoshinobu Nakatani,Kensuke Kobayashi,Teruo Ono +12 more
TL;DR: Evidence is given that this intrinsic pinning determines the threshold, and thus that the adiabatic spin torque dominates the domain wall motion in a perpendicularly magnetized Co/Ni nanowire, to achieve robust operation and low energy consumption in spintronic devices.
Journal ArticleDOI
Control of Multiple Magnetic Domain Walls by Current in a Co/Ni Nano-Wire
Daichi Chiba,Gen Yamada,Tomohiro Koyama,Kohei Ueda,Hironobu Tanigawa,Shunsuke Fukami,Tetsuhiro Suzuki,Norikazu Ohshima,Nobuyuki Ishiwata,Yoshinobu Nakatani,Teruo Ono +10 more
TL;DR: In this paper, a series of magnetic domain walls were reproducibly shifted in the same direction by the current, keeping the distance between the walls almost the same, and the walls can be shifted back and forth depending on the direction of the pulsed currents.
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Temperature dependence of spin-orbit torques across the magnetic compensation point in a ferrimagnetic TbCo alloy film
TL;DR: In this paper, the temperature dependence of spin-orbit torques and spindependent transport parameters is measured in bilayer Ta/TbCo ferrimagnetic alloy films with bulk perpendicular magnetic anisotropy.
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Spin-orbit torques in Ta/TbxCo100-x ferrimagnetic alloy films with bulk perpendicular magnetic anisotropy
TL;DR: In this article, the authors quantified the bulk perpendicular magnetic anisotropy and spin-orbit torques (SOTs) in bilayer Ta/TbxCo100-x ferrimagnetic alloy films with varying Tb concentration.