Instabilities in the Magnetization Vector in YIG at High Microwave Power Levels
- 1 August 1965
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 36 (8), 2566-2568
- https://doi.org/10.1063/1.1714530
Abstract
At microwave power levels above that necessary for spin‐wave growth in YIG coherent relaxation oscillations are observed for three distinct values of Hdc. The location of one of the regions and its change with power level agree closely with the location of a foldover region for Mz calculated by Suhl. Information is obtained on the relationship between the longitudinal relaxation time and the relaxation time of the oscillations by using spheres with different linewidths and by obtaining results at 300° and 77°K. The amplitude of the oscillations is also compared to the value of M0—Mz which is present just before the oscillations take place. The information obtained strongly indicates a foldover process is involved in the three regions.Keywords
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