Determination of the ferrimagnetic precession cone of in‐plane magnetized garnet films using optical modulation technique

Autor:	Horst Dötsch, M. Wallenhorst, R. Gerhardt, N. Bahlmann
Rok vydání:	1996
Předmět:	Materials science Condensed matter physics business.industry General Physics and Astronomy chemistry.chemical_element Yttrium Fundamental frequency Epitaxy Lutetium Condensed Matter::Materials Science Wavelength Optics chemistry Ferrimagnetism business Saturation (magnetic) Excitation
Zdroj:	Journal of Applied Physics. 80:3977-3981
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.363372
Popis:	Magnetic garnet films of composition (A, Bi)3(Fe, B)5 O12 are grown by liquid phase epitaxy on [111] oriented substrates of Gd3 Ga5 O12, where A=yttrium or lutetium and B=aluminum or gallium. The ferrimagnetic resonance (FMR) of in‐plane magnetized films is studied by analyzing the modulation of light, which passes the film parallel to the film normal. Modulation efficiencies up to 1.8% at 2.9 GHz are observed at a wavelength of 0.633 μm. From the measured modulation intensities the precession angles of the FMR are derived. The dependence of the precession cone on the excitation frequency or on the external induction shows a foldover effect which, however, is smaller than for the FMR of perpendicularly magnetized films. Maximum precession angles up to 14° are achieved and the experiments indicate that saturation occurs. Light modulation is also observed at the first harmonic frequency, but the intensity is about 300 times weaker than at the fundamental frequency.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b983ef32d6b3b8d7221be96cfd960644 https://doi.org/10.1063/1.363372 Zobrazit plný text záznamu