Domain Structure of Y₂(Fe_xCo_1–x)₁₇ Compounds and Their Hydrides: Qualitative and Quantitative Analysis

The quasi-binary Y₂(Fe_xCo \(_{{1-x}}\) )₁₇ compounds possess the easy-axis anisotropy type in a wide compositional range x = 0.05–0.50. The hydrogenation process of these compounds leads to a change in the magnetic characteristics—an increase in the Curie temperature and a variation in the values of the magnetocrystalline anisotropy constants. This work presents the complex investigation of the magnetic domain structure of both the original and hydrogenated samples of the Y₂(Fe_xCo \(_{{1-x}}\) )₁₇ compounds. Qualitative comparative analyses and micromagnetic calculations were carried out.