Abstract
Experimental results using longitudinally pumped YIG at X band are described. It is shown that absorption as a function of applied field depends on the manner in which the YIG sample is supported. When the sample is loosely mounted the absorption characteristics show evidence of magnetoelastic coupling. A value for the exchange constant determined under this condition is in good agreement with that obtained by Turner. When the sample is more rigidly mounted the absorption characteristic changes markedly and it appears that the magnetoelastic coupling is suppressed. A discontinuity in the absorption characteristic is also observed at a field strength well below the critical threshold value. Differences in absorption between up and down cycles of the sweep field are also reported.
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