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

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.

Automated summary

The complex magnetic transition, magnetocaloric effect, refrigerant capacity, and magnetic-phase diagram of single-phase TbDyHoEr high-entropy alloy were investigated. Results showed that the melt-spun treatment significantly improved the refrigerant capacity of TbDyHoEr from 883.19 to 1049.22 J kg(-1) due to complex magnetic transition and ideal table-like magnetocaloric effect. The improved application potential of TbDyHoEr as a high-efficient magnetic refrigeration material and the ideal table-like magnetocaloric effect in a large temperature range enable this material to meet the requirements of cryogenic and mesothermal refrigeration for an Ericsson cycle.