Extraordinary power and modulation dependence of the auto-oscillation frequency in tangentially magnetized YIG films

Autor:	Y. Kraftmakher, I. Laulicht
Rok vydání:	1999
Předmět:	Physics Field (physics) Condensed matter physics Oscillation business.industry Condensed Matter Physics Instability Electronic Optical and Magnetic Materials Power (physics) Magnetic field Amplitude Optics Modulation Spin wave business
Zdroj:	Journal of Magnetism and Magnetic Materials. 191:13-16
ISSN:	0304-8853
DOI:	10.1016/s0304-8853(98)00305-9
Popis:	The power dependence of auto-oscillations (AO) in yttrium–iron–garnet (YIG) film within a cavity is studied experimentally. We demonstrate that the dependence of the AO frequency on the pumping power is not always positive as commonly observed and calculated. We find DC magnetic field regions where the power dependence is negative. This behavior is extraordinary as it happens under pumping powers very close to the threshold, where the power dependence is supposed to be positive. Besides we demonstrate that the dependence of the AO frequency on the modulation amplitude of the DC magnetic field is not always negative as might be expected. At certain regions of the field we observe a positive dependence. This positive dependence on the modulation amplitude is consistent with the negative power dependence.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::60bf156dfe0ddceef9a658106feab4f1 https://doi.org/10.1016/s0304-8853(98)00305-9 Zobrazit plný text záznamu Full Text from ScienceDirect