Dec, 2020
Observation of the dispersion relations for quantized coherent spin waves excited by a microwave antenna
PHYSICAL REVIEW B
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- Volume
- 102
- Number
- 21
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevB.102.214440
- Publisher
- AMER PHYSICAL SOC
The propagation of coherent spin waves in permalloy microstrips was investigated using a heterodynemagneto-optical Kerr effect technique. The two-dimensional imaging reveals the mode interference with a high-order spin-wave mode along the microstrip width. The spin-wave dispersion relations across the microstrip width were deduced from fast Fourier transformations on the complex spin-wave amplitude of the one-dimensional scan, and multiple spin-wave modes were observed at the edges of the microstrips. These experimental results provide direct evidence for the quantization of spin-wave dispersion due to the finite width of the microstrips and enables us to evaluate the attenuation length for each quantized spin-wave mode.
- Link information
- ID information
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- DOI : 10.1103/PhysRevB.102.214440
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000603245500002