Magnetocaloric effect of GdTbDyErPr rare-earth high-entropy alloy

Yu LIU; Lei GAO; Jun PENG; Haitao GUO

doi:10.55713/jmmm.v36i3.2636

Authors

Yu LIU School of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou, China /Baotou Rewin Rare Earth Metal Materials Co.,Ltd., Baotou, China
Lei GAO National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou, China
Jun PENG School of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou, China
Haitao GUO Baotou Rewin Rare Earth Metal Materials Co.,Ltd., Baotou, China

DOI:

https://doi.org/10.55713/jmmm.v36i3.2636

Keywords:

Rare-earth high-entropy alloy, HCP structure, Magnetic properties, Magnetocaloric effect

Abstract

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^‒1and 462 J∙kg^‒1for 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

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