Large magnetocaloric effect induced by intrinsic structural transition in Dy1-xHoxMnO3

被引：63
|
作者：
Shao, Mingjie [1 ]
Cao, Shixun [1 ]
Yuan, Shujuan [1 ]
Shang, Jin [1 ]
Kang, Baojuan [1 ]
Lu, Bo [2 ]
Zhang, Jincang [1 ]
机构：
[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 22期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.4722930
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the magnetic and magnetocaloric properties of Dy1-xHoxMnO3 (0 <= x <= 1). Large entropy change of 12.5 J/kg K and refrigeration capacity of 312 J/kg at 7 T for HoMnO3 is calculated based on isothermal magnetization measurements. The peak temperature of magnetic entropy change for all samples keeps the same 10.5 K, indicating that Ho3+ doping only affects the value of magnetic entropy. An unambiguous intrinsic structural transition near 7 K is first observed by strain measurement, which is believed as the origin of magnetic symmetry transition of Dy1-xHoxMnO3 and induces the magnetocaloric effect with the cooperation interaction between Dy3+/Ho3+ and Mn3+ spins. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4722930]
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页数：4
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