Low Magnetic Damping of Ferrimagnetic GdFeCo Alloys
- Authors
- Kim, Duck-Ho; Okuno, Takaya; Kim, Se Kwon; Oh, Se-Hyeok; Nishimura, Tomoe; Hirata, Yuushou; Futakawa, Yasuhiro; Yoshikawa, Hiroki; Tsukamoto, Arata; Tserkovnyak, Yaroslav; Shiota, Yoichi; Moriyama, Takahiro; Kim, Kab-Jin; Lee, Kyung-Jin; Ono, Teruo
- Issue Date
- 28-3월-2019
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.122, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 122
- Number
- 12
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66596
- DOI
- 10.1103/PhysRevLett.122.127203
- ISSN
- 0031-9007
- Abstract
- We investigate the Gilbert damping parameter alpha for rare earth (RE)-transition metal (TM) ferrimagnets over a wide temperature range. Extracted from the field-driven magnetic domain-wall mobility, alpha was as low as the order of 10(-3) and was almost constant across the angular momentum compensation temperature T-A, starkly contrasting previous predictions that alpha( )should diverge at T-A due to a vanishing total angular momentum. Thus, magnetic damping of RE-TM ferrimagnets is not related to the total angular momentum but is dominated by electron scattering at the Fermi level where the TM has a dominant damping role. This low value of the Gilbert damping parameter suggests that ferrimagnets can serve as versatile platforms for low-dissipation high-speed magnetic devices.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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