中国物理B ›› 2016, Vol. 25 ›› Issue (12): 127104-127104.doi: 10.1088/1674-1056/25/12/127104
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Yi-Xu Wang(王一旭), Hu Zhang(张虎), Mei-Ling Wu(吴美玲), Kun Tao(陶坤), Ya-Wei Li(李亚伟), Tim Yan(颜天宝), Ke-Wen Long(龙克文), Teng Long(龙腾), Zheng Pang(庞铮), Yi Long(龙毅)
Yi-Xu Wang(王一旭)1, Hu Zhang(张虎)1, Mei-Ling Wu(吴美玲)1, Kun Tao(陶坤)1, Ya-Wei Li(李亚伟)1, Tim Yan(颜天宝)2, Ke-Wen Long(龙克文)2, Teng Long(龙腾)1, Zheng Pang(庞铮)1, Yi Long(龙毅)1
摘要:
The magnetic properties and magnetocaloric effects (MCE) of HoNiGa compound are investigated systematically. The HoNiGa exhibits a weak antiferromagnetic (AFM) ground state below the Ńeel temperature TN of 10 K, and the AFM ordering could be converted into ferromagnetic (FM) ordering by external magnetic field. Moreover, the field-induced FM phase exhibits a high saturation magnetic moment and a large change of magnetization around the transition temperature, which then result in a large MCE. A large -ΔSM of 22.0 J/kg K and a high RC value of 279 J/kg without magnetic hysteresis are obtained for a magnetic field change of 5 T, which are comparable to or even larger than those of some other magnetic refrigerant materials in the same temperature range. Besides, the μ0H2/3 dependence of |ΔSMpk| well follows the linear fitting according to the mean-field approximation, suggesting the nature of second-order FM-PM magnetic transition under high magnetic fields. The large reversible MCE induced by metamagnetic transition suggests that HoNiGa compound could be a promising material for magnetic refrigeration in low temperature range.
中图分类号: (Rare earth metals and alloys)