Microscopic theory of magnetism-based spintronics enriched by spin-orbit coupling

2016 Fiscal Year Final Research Report

• Project/Area Number: 25400339
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Nagoya University
• Principal Investigator: Kohno Hiroshi 名古屋大学, 理学研究科, 教授 (10234709)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: スピントロニクス

Outline of Final Research Achievements

We microscopically studied current-induced spin torques and spin motive forces in the presence of Rashba spin-orbit coupling (ROC) in ferromagnetic metals. By calculating torques up to the first order in spatial gradient of the magnetization, we found that the beta-term is enhanced by the Rashba SOC. Thermally induced spin-orbit torques are also examined. We also studied several phenomena that do not involve SOC, such as magnonic torques in ferromagnets, spin motive forces in antiferromagnetic metals, and topological Hall effect, all of which will be studied by including SOC in the future. Works that were unexpected at the beginning were also done, which include anomalous Hall effect driven by dipolar spin waves, and the effect of Rashba SOC on optical properties.

Free Research Field

物性理論