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Journal Articles

Observation of topological Hall torque exerted on a domain wall in the ferromagnetic oxide SrRuO$$_3$$

Yamanouchi, Michihiko*; Araki, Yasufumi; Sakai, Takaki*; Uemura, Tetsuya*; Ota, Hiromichi*; Ieda, Junichi

Science Advances (Internet), 8(15), p.eabl6192_1 - eabl6192_6, 2022/04

https://doi.org/10.1126/sciadv.abl6192
 Times Cited Count：7 Percentile：80.16(Multidisciplinary Sciences)

In a ferromagnetic Weyl metal SrRuO$$_3$$, a large effective magnetic field $$H_mathrm{eff}$$ exerted on a magnetic domain wall (DW) by current has been reported. We show that the ratio of $$H_mathrm{eff}$$ to current density exhibits nonmonotonic temperature dependence and surpasses those of conventional spin-transfer torques and spin-orbit torques. This enhancement is described well by topological Hall torque (THT), which is exerted on a DW by Weyl electrons emerging around Weyl points when an electric field is applied across the DW. The ratio of the $$H_mathrm{eff}$$ arising from the THT to current density is over one order of magnitude higher than that originating from spin-transfer torques and spin-orbit torques reported in metallic systems, showing that the THT may provide a better way for energy-efficient manipulation of magnetization in spintronics devices.

Journal Articles

High heat load test of molybdenum

Tanabe, Tetsuro*; Fujine, Michihiko*; Noguchi, Hiroshi*; Yagi, Yasufumi*; Hirano, Yoichi*; Shimizu, Hajime*; Akiba, Masato; Araki, Masanori; Kubota, Yusuke*; Miyahara, Akira*

Journal of Nuclear Materials, 200(1), p.120 - 127, 1993/03

https://doi.org/10.1016/0022-3115(93)90015-Q
 Times Cited Count：9 Percentile：66.89(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Fundamental study of acoustic emission in rotating machines by non-contact measurement using laser interferometer

Ota, Yasufumi; Saruta, Koichi; Noguchi, Shotaro; Ueda, Masashi

no journal, , 

no abstracts in English

Oral presentation

Temperature dependence of current-induced effective magnetic field acting on domain wall in SrRuO$$_{3}$$

Sakai, Takaki*; Yamanouchi, Michihiko*; Araki, Yasufumi; Uemura, Tetsuya*; Ota, Hiromichi*; Ieda, Junichi

no journal, , 

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