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HomeMaterials Science ForumMaterials Science Forum Vol. 820Application of Micromagnetic Models for Barium...

Application of Micromagnetic Models for Barium Ferrite Magnets

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Abstract:

The applicability of micromagnetics for phases with high magnetocrystalline anisotropy as barium ferrite Ba₂Fe₁₂O₁₉ and Nd₂Fe₁₄B is discussed. The Stoner-Wohlfarth model is very suitable for such phases, and also for PtFe and PtCo. It was discussed how to take into account the total energy of the system for grain size above the single domain particle size. For this situation of large grain size, the net magnetostatic energy of the system cannot be neglected. From energy considerations, it follows that the coercive force should decrease with the inverse of the square root of the grain size.

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Brazilian Ceramic Conference 58

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Periodical:

Materials Science Forum (Volume 820)

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199-204

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https://doi.org/10.4028/www.scientific.net/MSF.820.199

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Online since:

June 2015

Authors:

Marcos Flavio de Campos*, Fernanda A. Sampaio da Silva

Keywords:

Barium Ferrite, Coercivity, Hysteresis, Magnets

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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