| Magnetism and magnetic entropy change in LaFe11Al2Cx compounds around room temperature |
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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, Beijng 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijng 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijng 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijng 100080, China;State Key Laboratory of Magnetism, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijng 100080, China |
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| 基金项目： | Project supported by the State Key Development Program for Basic Research of China (973) (Grant No G1998061303), by the National High Technology Development Program of China (Grant No 2002A A324010), and by the National Natural Science Foundation of China (Grant No 10174094). |
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| 摘 要： | Magnetism and magnetic entropy changes in LaFe11A12Cx(x=0.0, 0.2 and 0.5) compounds have been investigated.The Curie temperature TC is conveniently controlled from 200K to room temperature by varying the carbon concentration.Large magnetic entropy change is obtained over a wide temperature range due to the high magnetization and the drastic decrease in the magnetization around TC.The large magnetic entropy change in wide temperature range,low cost and the convenience of controlling TC suggest that the LaFe11Al2Cx compounds are promising candidates for magnetic refrigerants in the corresponding temperature range.
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| 关 键 词： | 磁学 磁熵转变 居里温度 磁制冷 X射线衍射分析 |
| 收稿时间： | 2003-07-28 |
Magnetism and magnetic entropy change in LaFe11Al2Cx compounds around room temperature |
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| Wang Fang,Chen Yuan-Fu,Wang Guang-Jun,Sun Ji-Rong and Shen Bao-Gen.Magnetism and magnetic entropy change in LaFe11Al2Cx compounds around room temperature[J].Chinese Physics B,2004,13(3):393-396. |
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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, Beijng 100080, China |
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| Abstract: | Magnetism and magnetic entropy changes in LaFe_{11}Al_2C_x (x=0.0, 0.2 and 0.5) compounds have been investigated. The Curie temperature T_C is conveniently controlled from 200K to room temperature by varying the carbon concentration. Large magnetic entropy change is obtained over a wide temperature range due to the high magnetization and the drastic decrease in the magnetization around T_C. The large magnetic entropy change in wide temperature range, low cost and the convenience of controlling T_C suggest that the LaFe_{11}Al_2C_x compounds are promising candidates for magnetic refrigerants in the corresponding temperature range. |
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| Keywords: | magnetic entropy change La(Fe_xAl_{1-x})_{13} interstitial compounds |
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