期刊
PHYSICAL REVIEW B
卷 80, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.014429
关键词
magnetic anisotropy; magnetic thin films; magnetisation; Permalloy; spin waves; waveguides
资金
- Deutsche Forschungsgemeinschaft
- AFOSR [FA9550-08-1-0463, FA-9550-08-1-0058, 003658-0160-2007]
- Alfred P. Sloan Foundation
- University of Texas
- NSF-IGERT [DGE-0549417]
We have studied experimentally the radiation of spin waves from a permalloy-film microwaveguide into a continuous permalloy film. We show that due to a strong mismatch of the spin-wave spectrum caused by a variation in the demagnetizing field at the interface between the waveguide and the film, a frequency interval exists, where spin waves experience total reflection from the junction penetrating into the permalloy film in a tunnelinglike manner. At frequencies above this interval, complex frequency-dependent radiation patterns were observed characterized by a preferential radiation direction appearing due to the intrinsic anisotropy of the spin-wave dispersion characteristics in the film.
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