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Fe
O
Gomez-Perez, J. M.*; 大柳 洸一*; 八尋 黎明*; Ramos, R.*; Hueso, L. E.*; 齊藤 英治; Casanova, F.*
Applied Physics Letters, 116(3), p.032401_1 - 032401_5, 2020/01
被引用回数：10 パーセンタイル：50.37(Physics, Applied)We probe the current-induced magnetic switching of insulating antiferromagnet-heavy-metal systems, by electrical spin Hall magnetoresistance measurements and direct imaging, identifying a reversal occurring by domain wall (DW) motion. We observe switching of more than one-third of the antiferromagnetic domains by the application of current pulses. Our data reveal two different magnetic switching mechanisms leading together to an efficient switching, namely, the spin-current induced effective magnetic anisotropy variation and the action of the spin torque on the DWs.
八尋 黎明*; 吉川 貴史*; Ramos, R.*; 大柳 洸一*; 日置 友智*; 大門 俊介*; 齊藤 英治
Physical Review B, 101(2), p.024407_1 - 024407_7, 2020/01
被引用回数：21 パーセンタイル：75.11(Materials Science, Multidisciplinary)We report the observation of anomalous peak structures induced by hybridized magnon-phonon excitation (magnon polarons) in the magnetic field dependence of the spin Peltier effect (SPE) in a Lu
Bi
Fe
GaO (BiGa:LuIG) with Pt contact. The SPE peaks coincide with magnetic fields tuned to the threshold of magnonpolaron formation, consistent with the previous observation in the spin Seebeck effect. The enhancement of SPE is attributed to the lifetime increase in spin current caused by magnon-phonon hybridization in BiGa:LuIG.
