MAGNETOELASTIC INSTABILITIES IN THE FERRIMAGNETIC RESONANCE OF MAGNETIC GARNET-FILMS

Autor(en): YE, M
DOTSCH, H
Stichwörter: CHAOS; FERROMAGNETIC-RESONANCE; Materials Science; Materials Science, Multidisciplinary; MODEL; OSCILLATIONS; Physics; Physics, Applied; Physics, Condensed Matter
Erscheinungsdatum: 1991
Herausgeber: AMERICAN PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 44
Ausgabe: 17
Startseite: 9458
Seitenende: 9466
Zusammenfassung: 
The nonlinear magnetoelastic interaction in [111]-oriented films of yttrium iron garnet is investigated theoretically and experimentally. A system of nonlinear equations of motion, including boundary conditions, is introduced. An appropriate numerical method to solve such a boundary-value problem is developed. It is shown that the ferrimagnetic resonance (FMR) couples to elastic resonances. This nonlinear coupling leads to instability oscillations of the FMR or even to chaos, if the excitation level exceeds a critical threshold. The numerical calculations agree very well with experimental results. The influences of the material parameters on the nonlinear dynamics of the FMR have been investigated.
ISSN: 01631829
DOI: 10.1103/PhysRevB.44.9458

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