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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