Magnetocaloric effect of GdTbDyErPr rare-earth high-entropy alloy

In this study, a GdTbDyErPr rare-earth high-entropy alloy (RE HEA) was successfully synthesized and its magnetic properties and magnetocaloric effect (MCE) were systematically investigated. The results indicate that the as-cast GdTbDyErPr RE HEA exhibits a single-phase hexagonal close-packed (HCP) structure with lattice parameters of a = 3.609 Å and c = 5.734 Å. Based on large parameter Ω, high mixing entropy (ΔSmix), and small parameters δ and εi, it can be inferred that the GdTbDyErPr alloy forms a disordered solid solution. The GdTbDyErPr RE HEA undergoes a first-order magnetic transition near about 143 K. The parameters |∆ |, RC, and RCP are determined to be 6.8 J∙kg‒1K‒1, 352 J∙kg‒1 and 462 J∙kg‒1 for GdTbDyErPr RE HEA under 0 T to 5 T. The facile synthesizability and remarkable MCE of the GdTbDyErPr RE HEA position it as a promising candidate for magnetic cooling technology