| Itinerant-electron metamagnetic transition and giant magnetic entropy change in La0.8Ce0.2Fe11.4Si1.6 compound |
| |
| 作者姓名： | XU Chao LI Guodong LI Xiaowei WANG Ligang |
| |
| 作者单位： | [1]Department of Physics, Inner Mongolia University, Huhhot 010021,China [2]Department of Physics and Mathematics, HuaiHai Institute of Technology, Lianyungang 222005, China |
| |
| 基金项目： | Acknowledgements The authers are grateful to the help from the State Key Laboratory of Magnetism, Institute of Physics, the Chinese Academy of Sciences for data measurement. This work was supported by the National Natural Science Foundation of China （Grant No. 50164003）. |
| |
| 摘 要： | Iron-based rare-earth intermetallic compounds LaFe13?xSix (1.2≤x≤2.6) and CeFe13?xSix (2.4≤x≤2.6) both have the cubic NaZn13-type structure with Fm3c(Oh6) space-group symmetry1―3]. Fujita et al. 4] demonstrated that the cubic NaZn13-type LaFe13?xSi
|
| 关 键 词： | 磁制冷材料 稀土 金属间化合物 磁热效应 La0.8Ce0.2Fe11.4Si1.6 |
| 收稿时间： | 2006-02-12 |
| 修稿时间： | 2006-02-122006-06-15 |
Itinerant-electron metamagnetic transition and giant magnetic entropy change in La0.8Ce0.2Fe11.4Si1.6 compound |
| |
| XU Chao LI Guodong LI Xiaowei WANG Ligang.Itinerant-electron metamagnetic transition and giant magnetic entropy change in La0.8Ce0.2Fe11.4Si1.6 compound[J].Chinese Science Bulletin,2006,51(17):2046-2049. |
| |
| Authors: | Chao Xu Guodong Li Xiaowei Li Ligang Wang |
| |
| Institution: | (1) Department of Physics, Inner Mongolia University, Huhhot, 010021, China;(2) Department of Physics and Mathematics, Huaihai Institute of Technology, Lianyungang, 222005, China |
| |
| Abstract: | The crystal structure, itinerant-electron metamagnetic transition (IEMT) and magnetocaloric effect (MCE) in the iron-based
rare-earth intermetallic compound La0.8Ce0.2Fe11.4Si1.6 have been investigated. The powder X-ray diffraction revealed that the ingot of La0.8Ce0.2Fe11.4Si1.6 annealed at 1373 K in vaccuum for only 5 days could be crystallized in the cubic NaZn13-type structure. The La0.8Ce0.2Fe11.4Si1.6 compound exhibited giant values of the isothermal entropy change ΔS
M around the Curie temperature T
c (about 186 K). And the maximum value |ΔS
M|max is about 78.29 J/(kg·K) under a field change of 0–3 T, which can be calculated by the magnetization isotherms around T
c. Such a large MCE is attributed to the sharp change of magnetization and susceptibility around T
c and the first-order magnetic transition of field-induced IEMT above T
c. |
| |
| Keywords: | magnetic refrigerant material cubic NaZn13-type inter- metallic compounds itinerant-electron metamagnetic transition giant magnetocaloric effect |
| 本文献已被 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |
