Magnetic properties and magnetocaloric effect in compound PrFe12B6

被引：7
|
作者：
Wang Fang [1 ]
Shen Bao-Gen [2 ,3 ]
Zhang Jian [4 ]
Sun Ji-Rong [2 ,3 ]
Meng Fan-Bin [4 ]
Li Yang-Xian [4 ]
机构：
[1] Tianjin Univ Sci & Technol, Sch Sci, Tianjin 300222, Peoples R China
[2] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
来源：
CHINESE PHYSICS B | 2010年 / 19卷 / 06期
基金：
中国国家自然科学基金;
关键词：
magnetic properties; magnetic entropy change; first order phase transition; ROOM-TEMPERATURE; ENTROPY CHANGE;
D O I：
10.1088/1674-1056/19/6/067501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Magnetic properties and magnetocaloric effect of compound PrFe12B6 are investigated. The coexistence of hard phase PrFe12B6 and soft phase alpha-Fe causes interesting phenomena on the curves for the temperature dependence of magnetization. PrFe12B6 experiences a first order phase transition at the Curie temperature 200 K, accompanied by an obvious lattice contraction, which in turn results in a large magnetic entropy change. The Maxwell relation fails to give the correct information about magnetic entropy change due to the first order phase transition nature. The large magnetic entropy changes of PrFe12.3B4.7 obtained from heat capacity method are 11.7 and 16.2 J/kg.K for magnetic field changes of 0-2 T and 0-5 T respectively.
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收藏
页数：5
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