Critical Angles and Inhomogeneities in Thin Ferromagnetic Metal Films
- 1 September 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 4 (5), 1604-1607
- https://doi.org/10.1103/physrevb.4.1604
Abstract
The angular dependence of the intensities, linewidth, and resonance-field locations of standing spin-wave modes in thin permalloy films is precisely investigated. It is shown that each mode disappears at a specific angle. The value of this angle (measured between the normal of the film and the direction of the external magnetic field) decreases as the mode number increases. This behavior is not connected with the broadening of the linewidth and is well explained by assuming a weak inhomogeneity in the internal field. Theoretical analysis shows that the inhomogeneity is due to weak variations in the dc demagnetizing field rather than to the magnetization as generally assumed.Keywords
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