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Multiple magnetic resonances in permeability spectra of thick CoTaZr films

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2 Author(s)
Lee, D.W. ; Department of Materials Science and Engineering, Stanford University, 476 Lomita Mall, Stanford, California 94305-4045 ; Wang, S.X.

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Multiple resonance peaks were observed below the ferromagnetic resonance in the permeability spectra of CoTaZr films with thickness up to 3 μm. Analysis shows the power-law-like dependence of peak frequencies on the film thickness and the peak order, and the observed behavior was identical for both blanket and patterned CoTaZr samples. Experimental findings suggest that the observed modes corresponding to the multiple resonance peaks may not be related to the in-plane domain structure but rather are likely associated with a mechanism in the out-of-plane direction. Multiple resonance peaks disappeared when the lamination structures were used.

Published in:

Journal of Applied Physics  (Volume:99 ,  Issue: 8 )