期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.067201
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资金
- DFG Research Unit [1464]
- Strategic Japanese-German Joint Research Program from JST: ASPIMATT
- Graduate School Materials Science in Mainz (MAINZ) through DFG [GSC 266]
Magnetic Heusler materials with very low Gilbert damping are expected to show novel magnonic transport phenomena. We report nonlinear generation of higher harmonics leading to the emission of caustic spin-wave beams in a low-damping microstructured Co2Mn0.6Fe0.4Si Heusler waveguide. The source for the higher harmonic generation is a localized edge mode formed by the strongly inhomogeneous field distribution at the edges of the spin-wave waveguide. The radiation characteristics of the propagating caustic waves observed at twice and three times the excitation frequency are described by an analytical calculation based on the anisotropic dispersion of spin waves in a magnetic thin film. DOI: 10.1103/PhysRevLett.110.067201
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