High power ferromagnetic resonance and spin wave instability processes in Permalloy thin films
作者： Sung Yong An , Pavol Krivosik , Michael A. Kraemer , Heidi M. Olson , Alexey V. Nazarov
DOI: 10.1063/1.1763996
关键词: Permalloy 、 Spin wave 、 Ferromagnetic resonance 、 Condensed matter physics 、 Thin film 、 Microwave 、 Amplitude 、 Saturation (magnetic) 、 Instability 、 Materials science
摘要: The high power ferromagnetic resonance (FMR) response, as well butterfly curves of the spin wave instability threshold microwave field amplitude hcrit versus in-plane static H profiles, have been measured for Permalloy films with thicknesses 104, 128, and 270nm at a nominal pumping frequency 9.37GHz. values range from about 1 to 7Oe. Both saturation response FMR subsidiary absorption (SA) fields below are similar in appearance those bulk ferrites. Butterfly over SA region, while ferrites, exhibit film thickness dependent band edge cutoff effect not found curve data were analyzed on basis theory adapted thin films. observed shift agrees calculations based dispersion assumption first order processes ...
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