In work, the change of domain structure of CoNi microparticles caused by mechanical stress was studied. For this purpose, an array of identical square-shaped planar CoNi particles was formed on the surface of a polished glass substrate. Elastic bending of the substrate was used for creating of mechanical stress in the particles. It was shown by magnetic force microscopy, the magnetic structure of particles is possible to change from multidomain to quasi-homogeneous state by mechanical stress.

The results of the study of changes in the magnetic structure of planar permalloy microparticles under a mechanical stress are presented. The particles were formed on glass substrates and had the square shape in the sample plane. It was shown that uniaxial mechanical stresses can be detected from the images of such particles obtained by magnetic force microscope. The ranges of effectively using of the particles for a detection of the stresses were determined depending on the geometrical sizes of the particle.

The arrays of permalloy micron-sized particles with configurational anisotropy of shape was made by microsphere lithography technique. The properties of the particles were studied by atomic-force microscopy and magnetic-force microscopy. The magnetization distribution in particles was studied depending on the size of microspheres used in lithography process. The computer simulation of magnetic-force images of the particles was carried out. The quantitative and qualitative comparisons of shapes, sizes and reproducibility of particles fabricated by microsphere lithography and scanning probe lithography was performed.

Методами магнитно-силовой микроскопии проведено исследование распределения намагниченности в микрочастицах пермаллоя, обладающих конфигурационной анизотропией. Изучались треугольные частицы с различной степенью прогиба боковых сторон. Анализ полученных данных позволил установить, что частицы могут находиться в нескольких квазиоднородных стабильных состояниях. Было показано, что в зависимости от ориентации частицы относительно внешнего магнитного поля ее перемагничивание может происходить как скачкообразно, так и через промежуточное состояние. Продемонстрировано, что ориентацию квазиоднородной намагниченности в частице можно менять зондом магнитно-силового микроскопа.

There is presented results studying of changes of the domain structure of a planar square microparticle with dimensions 7.5 × 7.5 × 0.04 μm under uniaxial mechanical stress. Microparticles were made from following materials: permalloy (18% Fe, 82% Ni), permendur (50% Co, 50% Fe), halfenol (16% Ga, 84% Fe), Ni, terfenol (Tb0.3Dy0.7Fe1.92). It was concluded about promising of using these materials for creating microsensors of mechanical stress and for creating straintronic devices for processing and storing information.