Abstract
The theory of micromagnetics, as developed by W. F. Brown, provides an expression for the free energy of a magnetization field and then seeks to determine the field of minimum energy. We show, in the often considered case where exchange energy is omitted, that the minimum of free energy is not attained for uniaxial materials but is attained for cubic materials. A study of minimizing sequences reveals that these describe many features of observed domain structures. The coercivity paradox is reexamined from this point of view. We suggest how these considerations may be extended to consider the magnetostrictive effect. This is primarily a report on [28].
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James, R.D., Kinderlehrer, D. (1991). An Example of Frustration in a Ferromagnetic Material. In: Coron, JM., Ghidaglia, JM., Hélein, F. (eds) Nematics. NATO ASI Series, vol 332. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3428-6_16
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DOI: https://doi.org/10.1007/978-94-011-3428-6_16
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