Room Temperature Magnetocaloric effect in CrTe1-xSbx Alloys

TL;DR

This study demonstrates that Sb substitution in CrTe alloys enhances the magnetocaloric effect and relative cooling power near room temperature, making these alloys promising for cost-effective magnetic refrigeration.

Contribution

It introduces Sb-doped CrTe alloys with improved magnetocaloric properties suitable for room temperature cooling applications.

Findings

Increased maximum entropy change with Sb substitution.

RCP values improved by about 33% at 20% Sb.

CrTe_{1-x}Sb_{x} alloys are viable for room temperature magnetic cooling.

Abstract

We investigate the magnetocaloric effect (MCE), relative cooling power (RCP) and crystalline structure in Sb substituted CrTe_{1-x}Sb_{x} (0 \leq x \leq 0.2) alloy. The Rietveld refinement of the XRD pattern of CrTe1-xSbx showed the emerging of pure hexagonal NiAs structure with P63/mmc (194) space group with increasing Sb substitution. We detect a slight increase in the basal plane a-lattice parameter, with a much larger reduction in the c-axis. Magnetic isotherms were measured in the temperature range of 50-400K. The results revealed an increase in the maximum entropy change |S_{M}(T,H)| with Sb-substitutions in the temperature range (~285-325K). Moreover, The RCP values increased by about 33% with 20% Sb substitutions. These findings suggest that CrTe_{1-x}Sb_{x} alloys can be used in room temperature magnetic cooling at fraction of the coast of pure Gd element the porotype magnetic material for magnetic refrigeration.