Magnon-mediated Dzyaloshinskii-Moriya torque in homogeneous ferromagnets
- Authors
- Manchon, Aurelien; Ndiaye, Papa Birame; Moon, Jung-Hwan; Lee, Hyun-Woo; Lee, Kyung-Jin
- Issue Date
- 1-12월-2014
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.90, no.22
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 90
- Number
- 22
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96547
- DOI
- 10.1103/PhysRevB.90.224403
- ISSN
- 1098-0121
- Abstract
- In thin magnetic layers with structural inversion asymmetry and spin-orbit coupling, the DzyaloshinskiiMoriya interaction arises at the interface. When a spin-wave current j(m) flows in a system with a homogeneous magnetization m, this interaction produces an effective fieldlike torque of the form T-FL alpha m x (z x j(m)) as well as a dampinglike torque, T-DL alpha m x [(z x j(m)) x m], the latter only in the presence of spin-wave relaxation (z is normal to the interface). These torques mediated by the magnon flow can reorient the time-averaged magnetization direction and display a number of similarities with the torques arising from the electron flow in a magnetic two-dimensional electron gas with Rashba spin-orbit coupling. This magnon-mediated spin-orbit torque can be efficient in the case of magnons driven by a thermal gradient.
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