COUPLED MAGNETOELASTIC RESONANCES IN GARNET CRYSTALS STUDIED BY LIGHT-SCATTERING

Autor(en): STROTMANN, M
DOTSCH, H
SURE, S
LUHRMANN, B
STAAS, O
Stichwörter: FERRIMAGNETIC RESONANCE; FILMS; Physics; Physics, Condensed Matter
Erscheinungsdatum: 1994
Herausgeber: AKADEMIE VERLAG GMBH
Journal: PHYSICA STATUS SOLIDI B-BASIC RESEARCH
Volumen: 182
Ausgabe: 2
Startseite: 461
Seitenende: 469
Zusammenfassung: 
Films of yttrium iron garnet are grown by liquid phase epitaxy on substrates of gadolinium gallium garnet (GGG) of 5 mm thickness and orientation [111] or [110]. The ferrimagnetic resonance is excited at frequencies up to 2 GHz. Due to the magnetoelastic interaction standing elastic waves across the thickness of the crystal are induced. They have constant frequency separation of 350 kHz. Optical Bragg diffraction by these resonances is studied at a wavelength of 633 nm, yielding a comb structure of stable light oscillators at twice the excitation frequency. From the measurements the ratio P44/DELTAP for GGG is derived. At high power excitations instability oscillations of the ferrimagnetic resonance occur; the optical measurements demonstrate a strong nonlinear coupling of these instabilities to the elastic resonances.
ISSN: 03701972
DOI: 10.1002/pssb.2221820224

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