期刊
APPLIED PHYSICS LETTERS
卷 106, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4907173
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资金
- Ministry of Education, Singapore under Academic Research Fund [R144-000-340-112]
- National Research Foundation, Prime Minister's Office, Singapore under its Competitive Research Programme (CRP) [NRF-CRP12-2013-01]
Employing Brillouin spectroscopy, strong interfacial Dzyaloshinskii-Moriya interactions have been observed in an ultrathin Pt/CoFeB film. Our micromagnetic simulations show that spin-wave nonreciprocity due to asymmetric surface pinning is insignificant for the 0.8 nm-thick CoFeB film studied. The observed high asymmetry of the monotonic spin wave dispersion relation is thus ascribed to strong Dzyaloshinskii-Moriya interactions present at the Pt/CoFeB interface. Our findings should further enhance the significance of CoFeB as an important material for magnonic and spintronic applications. (C) 2015 AIP Publishing LLC.
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