Large Refrigerant Capacity Induced by Table-Like Magnetocaloric Effect in High-Entropy Alloys TbDyHoEr

摘要

Rare-earth-based high-entropy alloys (HEAs) with large magnetocaloric effect (MCE) have been recently recognized as good candidates for magnetic refrigeration. Herein, the complex magnetic transition, MCE, refrigerant capacity (RC), and magnetic-phase diagram of single-phase TbDyHoEr HEA are studied. It is showed in the results that due to complex magnetic transition and an ideal table-like MCE, the RC of TbDyHoEr is significantly improved from 883.19 to 1049.22 J kg(-1) by melt-spun treatment. In terms of RC value and hysteresis performance, the melt-spun treatment significantly improves the application potential of TbDyHoEr HEA as a high-efficient magnetic refrigeration material, and the ideal table-like MCE in a large temperature range enables this material to meet the requirements of both cryogenic refrigeration and mesothermal refrigeration for an Ericsson cycle.

关键词