Abstract
The effects of hydrogenation on microstructural parameters, surface topology, and the temperature of the magnetic phase transitions of Dy2Fe10Al7 compound were investigated. The magnetothermal properties of Dy2Fe10Al7H3.2 hydride were also investigated. It was established that the hydrogenation of Dy2Fe10Al7 compound does not change the Curie temperature, and strongly changes the temperature of magnetic compensation transition. It was found that the coercive force increases with hydrogenation, which allows to conclude that the magnetocrystalline anisotropy increases due to a change in the local environment of the dysprosium ion when hydrogen atoms are introduced into the crystal lattice. It was shown that the relative change in the unit cell volume dV/V for Dy2Fe10Al7H3.2 hydride is 3%. It can be conclude that the hydrogenation causes significant changes in the microstructure, which leads to a change the physical and functional properties of the materials subjected to the hydrogenation.
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