| Magnetic entropy change and large refrigerant capacity of Ce6Ni2Si3-type GdCoSiGe compound |
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| 作者姓名： | 沈俊 张虎 吴剑峰 |
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| 作者单位： | Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences State Key Laboratory for Magnetism,Institute of Physics,Chinese Academy of Sciences |
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| 基金项目： | supported by the National Natural Science Foundation of China (Grant Nos. 11004204 and 51001114);the Knowledge Innovation Project of the Chinese Academy of Sciences;the National Basic Research Program of China (Grant No. 2006CB601101) |
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| 摘 要： | Magnetic entropy change (△S M) and refrigerant capacity (RC) of Ce 6 Ni 2 Si 3-type Gd 6 Co 1.67 Si 2.5 Ge 0.5 compounds have been investigated.The Gd 6 Co 1.67 Si 2.5 Ge 0.5 undergoes a reversible second-order phase transition at the Curie temperature T C=296 K.The high saturation magnetization leads to a large △S M and the maximal value of △S M is found to be 5.9 J/kg · K around T C for a field change of 0-5 T.A broad distribution of the △S M peak is observed and the full width at half maximum of the △S M peak is about 101 K under a magnetic field of 5 T.The large RC is found around T C and its value is 424 J/kg.
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| 关 键 词： | Gd6 Co1.67 Si2.5 Ge0.5 compound magnetocaloric effect refrigerant capacity |
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