Coercive force in thin permalloy films
- 1 August 1965
- journal article
- other
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 12 (116) , 437-441
- https://doi.org/10.1080/14786436508218890
Abstract
No explicit mechanism has been involved in previous discussions of the pinning of domain walls by ‘inclusions’ during wall motion in thin uniaxial permalloy films. In these films cross-tie walls, consisting of Néel segments separated by narrow Bloch lines, occur over the approximate thickness range 100–1000 Å. These walls are observed to be pinned only at the Bloch line positions. It is proposed that the elimination of Bloch lines by coincident ‘inclusions’, whose size is about equal to the wall width, accounts for the pinning. The calculated coercive field due to such pinning is compatible with observed values. The same pinning mechanism is responsible for the production of 360° walls in films below about 150 Å thick.Keywords
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