期刊
APPLIED PHYSICS LETTERS
卷 93, 期 26, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3058764
关键词
demagnetisation; ferromagnetic materials; magnetic anisotropy; microwave spectra; Permalloy; spin waves
资金
- DFG [SFB 668, SFB 508, GrK 1286]
We investigate the spin-wave dispersion in rolled-up Permalloy microtubes based on self-rolling strained semiconductor layers. Using microwave absorption spectroscopy we find that these structures exhibit a characteristic spin-wave mode spectrum. The magnetization and spin-wave resonance at zero external magnetic field is determined by curvature induced dynamic demagnetization fields. At high magnetic fields transverse to the tube axis, the three-dimensional shape anisotropy of the tube results in spin-wave confinement in well-defined regions along the tube perimeter.
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