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Calculation of magnetostatic energy f m related to small-angle grain boundaries in three-axis ferromagnetics such as silicon steel

2001; Institute of Physics; Volume: 34; Issue: 3 Linguagem: Inglês

10.1088/0022-3727/34/3/309

1361-6463

L. Sheiko, À Sadovoy, G. Brekharya,

Electromagnetic Effects on Materials

A calculation was performed of the energy volume density fm in a magnetic field m that is caused by planar small-angle grain boundaries (GBs) in a polycrystalline ferromagnetic, such as silicon steel, with grains magnetized to saturation (M = MS). Equations for the field components, Hmξi and energy, fm, were obtained and solved, taking into account the µ*-effect near GBs. It is shown that deviations of the vectors such as S from the easy directions, ⟨100⟩, under the action of fields m at GBs leads to an essential (in ten times) decrease of the (Hmξi)max component and the ⟨(fm)max⟩ values. The influences of the orientation of the GB surfaces and µ* on the fm distribution are discussed. The results of the computation are compared with the corresponding experimental data for samples of grain-oriented silicon steel sheets.