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Observation of topological Hall torque exerted on a domain wall in the ferromagnetic oxide SrRuO3
| Title: | Observation of topological Hall torque exerted on a domain wall in the ferromagnetic oxide SrRuO3 |
| Authors: | Yamanouchi, Michihiko Browse this author →KAKEN DB | | Araki, Yasufumi Browse this author →KAKEN DB | | Sakai, Takaki Browse this author | | Uemura, Tetsuya Browse this author →KAKEN DB | | Ohta, Hiromichi Browse this author →KAKEN DB | | Ieda, Jun'ichi Browse this author →KAKEN DB |
| Issue Date: | 15-Apr-2022 |
| Publisher: | The American Association for the Advancement of Science（AAAS） |
| Journal Title: | Science advances |
| Volume: | 8 |
| Issue: | 15 |
| Start Page: | eabl6192 |
| Publisher DOI: | 10.1126/sciadv.abl6192 |
| Abstract: | In a ferromagnetic Weyl metal SrRuO3, a large effective magnetic field H-eff exerted on a magnetic domain wall (DW) by current has been reported. We show that the ratio of H-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-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. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/85550 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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