Magnon-mediated Dzyaloshinskii-Moriya torque in homogeneous ferromagnets
SCIE
SCOPUS
- Title
- Magnon-mediated Dzyaloshinskii-Moriya torque in homogeneous ferromagnets
- Authors
- Manchon, A; Ndiaye, PB; Moon, JH; Lee, HW; Lee, KJ
- Date Issued
- 2014-12-01
- Publisher
- AMER PHYSICAL SOC
- 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.
- Keywords
- DOMAIN-WALLS; SPIN-TORQUE; TOPOLOGICAL INSULATORS; DRIVEN; DYNAMICS; MAGNETIZATION; LAYER
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12314
- DOI
- 10.1103/PHYSREVB.90.224403
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 90, no. 22, 2014-12-01
- Files in This Item:
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