Magnetic Phase Transition and Magnetocaloric Effect in Ternary Er2Ni2Ga Compound

被引：31

作者：

Guo, Dan ^{[1
]}

Li, Huadong ^{[1
]}

Zhang, Yikun ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv Ferromet, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2019年 / 55卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Er2Ni2Ga; magnetic phase transition; magnetism; magnetocaloric effect (MCE); ENTROPY CHANGE; RE; TM; HO; DY; ER;

D O I：

10.1109/TMAG.2018.2878550

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The crystal structure, magnetism, and magnetocaloric effect (MCE) were investigated in ternary Er2Ni2Ga compound. The Er2Ni2Ga belongs to W2B2Co-type structure (orthorhombic, space group Immm). The magnetization measurements indicate that Er2Ni2Ga suffers a field-induced metamagnetic transition (antiferromagnetic-ferromagnetic) below Neel temperature (T-N) of 7.1 K. Inverse MCE occurs with magnetic field change (Delta H) lower than 0-30 kOe and at low temperatures, whereas normal reversible MCE happens with higher Delta H. The calculated -Delta S-M (magnetic entropy change) has a peak value of 12.93 J/kg K (similar to 9 K) with refrigerant capacity value of 265 J/kg (5-30 K) for Er2Ni2Ga under Delta H of 0-70 kOe.

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页数：4

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