Abstract We investigate the magnetocaloric effect (MCE), relative cooling power (RCP) and crystalline structure in Sb substituted CrTe1-xSbx (0 ≤ x ≤ 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 50–400 K. The results revealed an increase in the maximum entropy change |SM(T,H)| with Sb-substitutions in the temperature range (~285–325 K). Moreover, The RCP values increased by about 33% with 20% Sb substitutions. These findings suggest that CrTe1-xSbx 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.

中文翻译：

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CrTe1-xSbx 合金中的室温磁热效应

摘要 我们研究了 Sb 取代的 CrTe1-xSbx (0 ≤ x ≤ 0.2) 合金的磁热效应 (MCE)、相对冷却能力 (RCP) 和晶体结构。CrTe1-xSbx XRD 图案的Rietveld 细化表明，随着Sb 取代度的增加，出现了具有P63/mmc (194) 空间群的纯六方NiAs 结构。我们检测到基面 a 晶格参数略有增加，而 c 轴的减少幅度要大得多。在 50-400 K 的温度范围内测量了磁等温线。结果显示最大熵变|SM(T,H)| 增加。在温度范围 (~285–325 K) 内进行 Sb 取代。此外，RCP 值在 20% Sb 取代的情况下增加了约 33%。