The local magnetic anisotropy in the stress field of a single dislocation

Abstract

To study the local magnetic anisotropy in the microstress field of dislocations a first experimental investigation of the magnetic moment distribution around single dislocations is carried out in gadolinium-iron garnet single crystals at temperatures near the compensation point. It is established that under the conditions of weak dipolar interactions at dislocations characteristic rosettes of domains magnetized along different directions exist. Some peculiarities of their changes under the action of an external magnetic field and of temperature are studied. On the basis of magnetoelastic energy analysis it is shown that the magnetization and the form of dislocation domains are defined by the local anisotropy, induced in the dislocation elastic field, and their dimensions — by growth conditions of their nuclei arised in the vicinity of the defect core. [Russian Text Ignored].