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

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

2001-11-14

arxiv.org/abs/cond-mat/0111252v1

Physics

Condensed Matter

Materials Science

5 pages, 3 Figures included

Scientific paper

10.1238/Physica.Topical.102a0010

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 \div 1 \mu m$ at temperatures grater than the bulk Curie temperature by about $10^2$ K.

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