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Spin-wave eigenmodes in single disk-shaped FeB nanomagnet

Title
Spin-wave eigenmodes in single disk-shaped FeB nanomagnet
Authors
Cho, J[Cho, Jaehun]Miwa, S[Miwa, Shinji]Yakushiji, K[Yakushiji, Kay]Tamaru, S[Tamaru, Shingo]Kubota, H[Kubota, Hitoshi]Fukushima, A[Fukushima, Akio]Fujimoto, S[Fujimoto, Satoshi]Tamura, E[Tamura, Eiiti]You, CY[You, Chun-Yeol]Yuasa, S[Yuasa, Shinji]Suzuki, Y[Suzuki, Yoshishige]
DGIST Authors
You, CY[You, Chun-Yeol]
Issue Date
2016-11-11
Citation
Physical Review B: Condensed Matter and Materials Physics, 94(18)
Type
Article
Article Type
Article
ISSN
2469-9950
Abstract
Spin-wave eigenmodes in a disk-shaped FeB nanomagnet were investigated using magnetic tunnel junctions with a FeB magnetic layer and MgO barrier. Noise spectrum measurements for a perpendicularly magnetized junction of 120 nm in diameter showed thermal excitation of distinct spin-wave modes. The measured spectra were compared with analytical calculations and numerical simulations. As a result, the observed modes were classified as spin-wave eigenmodes with various nodal circles and nodal diameter modes by taking into account splitting between directional spin-wave modes originating from dynamic dipolar interaction instead of Dzyaloshinskii-Moriya interaction. These results provide a fundamental understanding of spin dynamics in nanosize spintronic devices. © 2016 American Physical Society.
URI
http://hdl.handle.net/20.500.11750/2129
DOI
10.1103/PhysRevB.94.184411
Publisher
American Physical Society
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles


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