Coherent Spin‐Wave—Phonon Interactions in Thin Magnetic Films
| Autor: | M. R. Shanabarger, W. I. Dobrov, P. E. Wigen |
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| Rok vydání: | 1966 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 37:1000-1000 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.1708304 |
| Popis: | The excitation of microwave ultrasonics by ferromagnetic resonance in magnetic thin films at 10 Gc/sec has been analyzed on the basis of a spatial inhomogeneity in the internal field as treated by Kooi.1 Four types of magnetoelastic interaction processes were studied experimentally in thin Permalloy films at X band: phonon excitation by spin waves (M→P), spin‐wave excitation by phonons (P→M), re‐excitation of spin waves by phonons which were originally produced by spin waves (M→M) and the attenuation of piezoelectrically generated and detected phonons by spin waves (P→P). Observations were made in films with compositions varying from 77% Ni to 85% Ni. In each film distinct spin‐wave modes were observed and a one‐to‐one correspondence between the spin‐wave modes and the phonon modes could be determined. A value for the magnitude of the transverse magnetoelastic constant was obtained from the measurements of the P→P process. Using the measured value of b2, conversion coefficients were computed for the M⇆P a... |
| Databáze: | OpenAIRE |
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