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В работе методом индукционной плавки получен сплав SmFe[2] в высокочистом однофазном состоянии. Методами атомно-силовой и магнитно-силовой микроскопии исследованы особенности поверхности сплава при комнатной температуре. Выявлено наличие неоднородной зернистой структуры, определены основные структурные элементы. Показано наличие сложной доменной структуры, проведено ее описание, определены размеры доменов. Представлены результаты рентгеноструктурных исследований в интервале температур 100 – 300 K. Получены и проанализированы экспериментальные данные по температурным зависимостям магнитострикции в магнитных полях до 1,2 Тл в области спин-переориентационного фазового перехода. Косвенно подтверждено существование "угловой" фазы, уточнены ее температурные границы.
In this study, the SmFe[2] alloy in a high-purity single-phase state has been prepared by the induction melting technique. The surface features of the alloy at room temperature were investigated using the atomic-force and magnetic-force microscopy. The forming of heterogeneous granular structure was revealed, the main structural elements were determined. The presence of the complex domain structure was shown, its description was presented and the domain sizes were found. The results of X-ray structural studies over the temperature range from 100 to 300 K were presented. The experimental data on the temperature dependences of magnetostriction in magnetic fields up to 1.2 T were obtained and analyzed in the region of the spin-reorientational phase transition. The existence of the "angular" phase was indirectly confirmed, its temperature boundaries were refined.
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