Abstract

Influence of hydrogenation on the microstructural parameters, surface topology, and temperatures of magnetic phase transitions in Dy₂Fe₁₀Al₇ was studied. Thermomagnetic properties in the obtained hydride Dy₂Fe₁₀Al₇H_3.2 were also investigated. Hydrogenation was found not to change the Curie point of the compound Dy₂Fe₁₀Al₇, but at the same time it affects remarkably the temperature of the magnetic compensation transition. The coercive force increases upon hydrogenation, and thus the magnetocrystalline anisotropy can be concluded to increase due to changes in the local environment of the dysprosium ion caused by insertion of hydrogen atoms into the crystal lattice. The relative volume change ΔV/V of the unit cell of the hydride Dy₂Fe₁₀Al₇H_3.2 was shown to be 3%. The investigation of the peculiarities of the structural state allowed concluding that hydrogenation causes significant modification of the microstructure, which in turn changes the physical and functional properties of the hydrogenated materials.

中文翻译：

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金属间化合物Dy 2 Fe 10 Al 7及其氢化物的磁性和表面形貌

摘要

研究了氢化对Dy ₂ Fe ₁₀ Al ₇中的微观结构参数，表面拓扑和磁性相变温度的影响。还研究了所得氢化物Dy ₂ Fe ₁₀ Al ₇ H _3.2中的热磁性能。发现氢化不会改变化合物Dy ₂ Fe ₁₀ Al ₇的居里点，但同时会显着影响磁补偿过渡的温度。氢化时矫顽力增加，因此可以归因于由于氢原子插入晶格引起的ion离子的局部环境的变化，导致磁晶各向异性增加。氢化物Dy ₂ Fe ₁₀ Al ₇ H _3.2晶胞的相对体积变化ΔV / V被证明是3％。通过对结构状态的特殊性进行研究，可以得出结论，氢化会引起微观结构的显着改变，进而改变氢化材料的物理和功能特性。