Abstract The europium-based intermetallic compounds EuAgZn, EuAgCd, EuPtZn and EuAuCd were synthesized and their magnetic properties and magnetocaloric performances were systematically studied. EuAgZn and EuAgCd compounds crystallize in a KHg2-type structure belonging to space group Imma, whereas EuPtZn and EuAuCd crystallize in a TiNiSi-type structure belonging to space group Pnma. The four compounds contain stable divalent europium and order ferromagnetically with Curie temperatures of TC ~29, 27, 20 and 22 K for EuAgZn, EuAgCd, EuPtZn and EuAuCd, respectively. A considerable tunable reversible MCE can be observed accompanied by a second-order magnetic transition. For the field change of 0–2 and 0–5 T, the − Δ S Μ max values are evaluated to be 7.7, 7.2, 8.2, 8.0 and 14.9, 13.5, 15.3, 13.7 J/kgK for EuAgZn, EuAgCd, EuPtZn and EuAuCd, respectively.

中文翻译：

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等原子铕金属间化合物 EuAgZn、EuAgCd、EuPtZn 和 EuAuCd 的磁性和磁热特性

摘要 合成了铕基金属间化合物EuAgZn、EuAgCd、EuPtZn和EuAuCd，并对其磁性和磁热性能进行了系统研究。EuAgZn 和 EuAgCd 化合物在属于 Imma 空间群的 KHg2 型结构中结晶，而 EuPtZn 和 EuAuCd 在属于空间群 Pnma 的 TiNiSi 型结构中结晶。这四种化合物含有稳定的二价铕并且具有铁磁性有序排列，EuAgZn、EuAgCd、EuPtZn 和 EuAuCd 的居里温度分别为 TC ~29、27、20 和 22 K。伴随着二阶磁跃迁，可以观察到相当大的可调可逆 MCE。对于 0-2 和 0-5 T 的场变化，EuAgZn、EuAgCd、EuPtZn 和 EuPtZn 的 − Δ S M 最大值估计为 7.7、7.2、8.2、8.0 和 14.9、13.5、15.3、13.7 J/kgK EuAuCd,