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Enhancement of magnetic ordering by the stress fields of grain boundaries in ferromagnets

A. Kadigrobov·Z. Ivanov·R. I. Shekhter·M. Jonson
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Abstract

In the paper we predict a distinctive change of magnetic properties and considerable increase of the Curie temperature caused by the strain fields of grain boundaries in ferromagnetic films. It is shown that a sheet of spontaneous magnetization may arise along a grain boundary at temperatures greater than the bulk Curie temperature. The temperature dependence and space distribution of magnetization in a ferromagnetic film with grain boundaries are calculated. We found that $45^\circ$ grain boundaries can produce long-range strain fields that results in the width of the magnetic sheet along the boundary of the order of $ 0.5 ÷1 μm$ at temperatures grater than the bulk Curie temperature by about $10^2$ K.

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A. Kadigrobov, Z. Ivanov, R. I. Shekhter, M. Jonson. 2001-11-14. Enhancement of magnetic ordering by the stress fields of grain boundaries in ferromagnets. https://doi.org/10.1238/physica.topical.102a00103

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