Abstract
Magnetic cooling technology based on the magneto-caloric effect (MCE) has emerged as a viable alternative to conventional vapor compression refrigeration technology. Exploring suitable magnetic solids with promising magneto-caloric performances is a key issue in this field. Here, we report a systematic characterization of the glass forming ability, microstructure, magnetism and MCE of Ho57Cu25Al18 and Tm57Cu25Al18 amorphous ribbons. Promising MCE performances were observed for both ribbons at low temperature. Compared with most of the rare earth-based amorphous alloys, both ribbons were found to have comparable or even larger values of -ΔSMmax (maximum magnetic entropy change), RC (refrigeration capacity) and RCP (relative cooling power). These promising magneto-caloric performances make amorphousized RE57Cu25Al18 ribbons attractive for active cryogenic magnetic refrigeration.
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