| Large magnetic entropy change and magnetic properties in La （Fel－xMnx）ll.TSil.3Hy compounds |
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| 引用本文： | 王芳,陈远富,王光军,孙继荣,沈保根.Large magnetic entropy change and magnetic properties in La （Fel－xMnx）ll.TSil.3Hy compounds[J].中国物理 B,2003,12(8):911-914. |
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| 作者姓名： | 王芳 陈远富 王光军 孙继荣 沈保根 |
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| 作者单位： | State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the State Key Programme of Basic Research of China (973) (Grant No G 1998061303), by the National High Technology Development Programme of China (Grant No. 2002A A324010), and by the National Natural Science Foundation of China (Grant No 10174094). |
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| 摘 要： | Magnetic properties and magnetic entropy change in La(Fe_{1-x}Mn_x)_{11.7}Si_{1.3}H_y compounds have been investigated. A significant increase of the Curie temperature T_C and a small increase of the saturation magnetizations μ_S have been observed after the introduction of interstitial H, which caused a slight volume expansion. The first-order field-induced itinerant-electron metamagnetic (IEM) transition remains and brings about a large magnetic entropy change around room temperatures for the compounds. The maximal magnetic entropy change is about 23.4, 17.7 and 15.9J/kg·K under a magnetic field change from 0 to 5T for x=0.01, 0.02 and 0.03, respectively. Therefore, the compounds appear to be potential candidates for magnetic refrigerants around room temperatures.
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| 关 键 词： | 巨磁性 熵变 巡回电子变磁性转变 磁学性质 La（Fel-xMnx）ll.TSil.3Hy化合物 磁性材料 |
| 收稿时间： | 2003-02-12 |
Large magnetic entropy change and magnetic properties in La(Fe1-xMnx11.7Si1.3Hy compounds |
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| Wang Fang,Chen Yuan-Fu,Wang Guang-Jun,Sun Ji-Rong and Shen Bao-Gen.Large magnetic entropy change and magnetic properties in La(Fe1-xMnx11.7Si1.3Hy compounds[J].Chinese Physics B,2003,12(8):911-914. |
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| Authors: | Wang Fang Chen Yuan-Fu Wang Guang-Jun Sun Ji-Rong and Shen Bao-Gen |
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| Institution: | State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Magnetic properties and magnetic entropy change in La(Fe_{1-x}Mn_x)_{11.7}Si_{1.3}H_y compounds have been investigated. A significant increase of the Curie temperature T_C and a small increase of the saturation magnetizations μ_S have been observed after the introduction of interstitial H, which caused a slight volume expansion. The first-order field-induced itinerant-electron metamagnetic (IEM) transition remains and brings about a large magnetic entropy change around room temperatures for the compounds. The maximal magnetic entropy change is about 23.4, 17.7 and 15.9J/kg·K under a magnetic field change from 0 to 5T for x=0.01, 0.02 and 0.03, respectively. Therefore, the compounds appear to be potential candidates for magnetic refrigerants around room temperatures. |
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| Keywords: | magnetic entropy change itinerant-electron metamagnetic transition |
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