Coherent terahertz spin-wave emission associated with ferrimagnetic domain wall dynamics
- Authors
- Oh, Se-Hyeok; Kim, Se Kwon; Lee, Dong-Kyu; Go, Gyungchoon; Kim, Kab-Jin; Ono, Teruo; Tserkovnyak, Yaroslav; Lee, Kyung-Jin
- Issue Date
- 28-9월-2017
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.96, no.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 96
- Number
- 10
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/82183
- DOI
- 10.1103/PhysRevB.96.100407
- ISSN
- 2469-9950
- Abstract
- We theoretically study the dynamics of ferrimagnetic domain walls in the presence of a Dzyaloshinskii-Moriya interaction. We find that an application of a dc magnetic field can induce terahertz spin-wave emission by driving ferrimagnetic domain walls, which is not possible for ferromagnetic or antiferromagnetic domain walls. The Dzyaloshinskii-Moriya interaction is shown to facilitate terahertz spin-wave emission in a wide range of the net angular momentum by increasing the Walker breakdown field. Moreover, we show that spin-orbit torque combined with the Dzyaloshinskii-Moriya interaction also drives fast ferrimagnetic domain wall motion by emitting terahertz spin waves in a wide range of the net angular momentum.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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