Dynamics of Magnetic Bubble Domains with an Application to Wall Mobilities

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Abstract
By introducing a rather simple functional approximation for the magnetostatic energy in the bubble‐domain theory of Thiele, we obtain explicit expressions for static properties such as the collapse field and the bubble size in a given bias field. The theory is extended to dynamic properties as well. In particular, we obtain a simple expression for wall mobility based on the bubble collapse technique introduced by Bobeck. We have carried out bubble size and mobility measurements on orthoferrite platelets, and we find excellent agreement with the functional form of the theory.

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