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Domain theory model for magnetic thin films

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1 Author(s)
Smith, N. ; Eastman Kodak Co., San Diego, CA, USA

A domain-theoretic model for external-field-driven magnetization processes in thin-film microelements is described. The film is mathematically described by a dynamic grid of quadrilateral domains whose magnetization directions and vertex locations are variables with which to minimize the total free energy. The magnetostatic interaction between uniformly (in-plane) magnetized polygonal domains is essentially treated exactly. Predicted results for reversal mechanisms and field-induced metastable remanent domain configurations in Permalloy microelements are in good qualitative agreement with Bitter pattern observations

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Magnetics, IEEE Transactions on  (Volume:24 ,  Issue: 6 )