Magnetic and magnetoresistive properties of cubic Laves phase HoAl₂ single crystal

الأصل · EN

We report the magnetization (M) and magnetoresistance (MR) results of HoAl₂ single crystals oriented along <100> and <110> directions. Although HoAl₂ has cubic Laves phase structure, a large anisotropy is observed in M and MR results below Curie temperature (TC) at 31.5 K. A satisfactory correlation between magnetic entropy change (ΔSₘ) and MR could be established along <110> direction and in <100> direction except for the temperature (T) region, around which spin reorientation takes place. Large inverse magnetocaloric effect is observed at low-T which is associated with the spin reorientation process in <100> direction. A theoretical model based on Landau theory of phase transition can describe T-variation of -ΔSₘ for T > TC.