Cryogenic magnetic properties in the pyrochlore RE2TiMnO7 (RE = Dy and Ho) compounds

被引：10
作者：
Zhang, Yikun [1 ,2 ,3 ]
Li, Huadong [1 ,2 ,3 ]
Guo, Dan [1 ,2 ,3 ]
Ren, Zhongming [1 ,2 ,3 ]
Wilde, Gerhard [4 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Adv Ferromet, Shanghai 200072, Peoples R China
[3] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[4] Univ Munster, Inst Mat Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany
来源：
CERAMICS INTERNATIONAL | 2018年 / 44卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Cryogenic magnetic properties; Pyrochlore RE2TiMnO7; Magnetocaloric effect (MCE); Microstructure; Magnetic refrigeration; MAGNETOCALORIC PROPERTIES; ENTROPY CHANGE; R2NIMNO6; R; TRANSITIONS; TM; GD;
D O I：
10.1016/j.ceramint.2018.05.239
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Pyrochlore RE2TiMnO7 (RE = Dy and Ho) compounds were synthesized using a ceramic method, and their crystal structures, microstructures, and cryogenic magnetic properties were determined. Dy2TiMnO7 and Ho2TiMnO7 compounds belong to the Fd-3m space group with a cubic pyrochlore structure and show a considerable reversible magnetocaloric effect (MCE) in the vicinity of the second-order ferromagnetic-paramagnetic (FM-PM) phase transition at the Curie temperature (T-c) of 7.6 and 7.5 K, respectively. The obtained maximal values of magnetic entropy change (-Delta S-M(max)) for Dy2TiMnO7 and Ho2TiMnO7 are 12.50 and 13.95 J/kg K under a magnetic field change (Delta H) of 0-7 T, respectively. Correspondingly, the relative cooling power (RCP) values reach 530.3 and 573.2 J/kg, respectively.
引用
收藏
页码：15681 / 15685
页数：5
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