NONLINEARITIES IN THE FERRIMAGNETIC RESONANCE IN EPITAXIAL GARNET-FILMS

Autor(en): LUHRMANN, B
YE, M
DOTSCH, H
GERSPACH, A
Stichwörter: FERROMAGNETIC-RESONANCE; IRON-GARNET; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Condensed Matter; WAVE
Erscheinungsdatum: 1991
Herausgeber: ELSEVIER SCIENCE BV
Journal: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volumen: 96
Ausgabe: 1-3
Startseite: 237
Seitenende: 244
Zusammenfassung: 
The ferrimagnetic resonance of magnetic garnet films has been measured at foldover and instability conditions. The resonance is excited locally within a region of about 50-mu-m diameter. Large precession angles of more than 80-degrees can be achieved within this region, if the saturation magnetization M(s) is small. If M(s) is large, the precession spreads out far beyond the excitation region while simultaneously the maximum of the precession angle is reduced. For instability oscillations the time variations of the polar and azimuthal angle are determined separately. It turns out that the polar angle variation lags behind the variation of the azimuthal angle and that its amplitude is small compared to that of the azimuthal angle.
ISSN: 03048853
DOI: 10.1016/0304-8853(91)90635-N

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