| Dy（Co_（1-x）Mn_x）_2合金的相变和磁热效应 |
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| 引用本文： | 韩志达,陈杰.Dy（Co_（1-x）Mn_x）_2合金的相变和磁热效应[J].常熟理工学院学报,2011,25(4):23-26. |
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| 作者姓名： | 韩志达 陈杰 |
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| 作者单位： | 1. 常熟理工学院,物理与电子工程学院,江苏常熟,215500;常熟理工学院,江苏省新型功能材料重点建设实验室,江苏常熟,215500
2. 常熟理工学院,物理与电子工程学院,江苏常熟,215500 |
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| 基金项目： | 国家自然科学基金青年基金项目(51001019) |
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| 摘 要： | 采用电弧熔炼的方法制备了Dy（Co1-xMnx）2系列合金,并对其磁性和相变进行了研究.随着Mn含量的增加,晶格常数逐渐增大,同时居里温度逐渐提高.Mn的加入使相变类型从一级相变变为二级相变、使磁熵变大小有所降低.研究结果表明该系列合金在磁制冷领域有潜在应用价值.
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| 关 键 词： | 一级相变 二级相变 磁熵变 磁制冷 |
The Phase Transition and Magnetocaloric Effect in Dy(Co_(1-x)Mn_x)_2 Alloys |
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| HAN Zhi-da,CHEN Jie.The Phase Transition and Magnetocaloric Effect in Dy(Co_(1-x)Mn_x)_2 Alloys[J].Journal of Changshu Institute of Technology,2011,25(4):23-26. |
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| Authors: | HAN Zhi-da CHEN Jie |
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| Institution: | HAN Zhi-daa,b,CHEN Jiea(a.School of Physics and Electronics Engineering Changshu Institute of Technology,b.Jiangsu Key Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China) |
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| Abstract: | Dy(Co1-xMnx)2 alloys were prepared by arc melting,and their magnetic properties and phase transitions were investigated.With the increase of Mn content,the lattice constant as well as the Curie temperature increases gradually.Mn addition induces the type of phase transition from first order to second order,which results in the reduction of magnetic entropy change.The results suggest great potential of Dy(Co1-xMnx)2 alloys as magnetic refrigerant. |
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| Keywords: | first-order transition second-order transition magnetocaloric effect magnetic refrigeration |
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