Domain structure of CoNi microparticles under mechanical stress

In this work, the results of the study of the domain structure of planar CoNi microparticles are presented. The microparticles represented squares with a side of 7 μm and height of 0.03 μm. It was shown that in the non-stressed state the particles had the regular four-domain state. The mechanical stress (compression) of the particles led to a change in domain size, which depended on the degree of compression, the angle between the direction of magnetization, and the side of the mechanical stress. Under the mechanical stress, the change in the coercive force and the residual magnetization of the particles was observed.