Ferromagnetic resonance foldover and spin-wave instability in single-crystal YIG films

Author

Chen, M. ; Patton, C.E. ; Srinivasan, G. ; Zhang, Y.T.

Author_Institution

Dept. of Phys., Colorado State Univ., Fort Collins, CO, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3485

Lastpage

3487

Abstract

Foldover in ferromagnetic resonance (FMR) has been theoretically investigated. The objective was to calculate field shifts for the FMR shoulder associated with foldover, following the analysis of E. Schlomann (1959), and to make a detailed comparison with perpendicular FMR data recently published by Y.T. Zhang et al. (1988). The observed shifts were somewhat smaller than predicted theoretically on the basis of a single low-power FMR linewidth. However, the theory could be fitted to the data by allowing the effective resonance linewidth to increase with the microwave power level. Such an increase in the effective resonance linewidth is consistent with the increase in losses that is known to occur at high power levels

Keywords

ferromagnetic resonance; garnets; magnetic thin films; spin waves; yttrium compounds; YFe5O12; effective resonance linewidth; ferromagnetic resonance foldover; microwave power level; single crystal YIG films; single low-power FMR linewidth; spin-wave instability; Electromagnetic heating; Electromagnetic wave absorption; Magnetic field measurement; Magnetic materials; Magnetic resonance; Microwave measurements; Microwave theory and techniques; Nonlinear distortion; Physics; Pulse measurements;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42343

Filename

42343