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HomeMaterials Science ForumMaterials Science Forum Vol. 802Virtues and Weakness of Brown Micromagnetics

Virtues and Weakness of Brown Micromagnetics

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Abstract:

Micromagnetics and its particular case, the Stoner-Wohlfarth model, are reviewed. The possibility of occurrence of curling is discussed. The use of the Felix Bloch approximation for exchange energy description should be avoided. A tensor 3x3 has to be used for appropriate evaluation of the exchange energy in phases with less symmetry, as Nd₂Fe₁₄B, Sm₂Co₁₇ and SmCo₅. The assumptions used in classic Brown micromagnetics make it less suitable for phases with high magnetocrystalline anisotropy. The role of the exchange term in the Stoner-Wohlfarth Callen-Liu-Cullen model is clarified.

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Periodical:

Materials Science Forum (Volume 802)

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613-618

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https://doi.org/10.4028/www.scientific.net/MSF.802.613

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Online since:

December 2014

Authors:

Marcos Flavio de Campos

Keywords:

Coercivity, Hysteresis, Magnets, NdFeB, SmCo

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