Magnetocaloric effect in rare earth-based bulk metallic glasses
文献类型：期刊论文
| 作者 | Luo, Q ; Wang, WH |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2010 |
| 卷号 | 495期号:1页码:209 |
| 关键词 | MAGNETIC ENTROPY CHANGE REFRIGERATION CYCLE THERMAL-STABILITY AMORPHOUS-ALLOYS CERIUM ND CRYSTALLIZATION TRANSITION CAPACITY FIELD |
| ISSN号 | 0925-8388 |
| 通讯作者 | Wang, WH: Chinese Acad Sci, Inst Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Magnetocaloric effect (MCE) of rare earth-based bulk metallic glasses (BMGs) and the influences of applied field, structural change induced by microalloying, aging and crystallization on the MCE are systematically investigated. For all the as-cast alloys the magnetic entropy changes (-Delta S(m)) compare favorably with that of pure Gd metal, some are even better. Our results indicate that the BMGs and corresponding composites induced by partial crystallization be attractive candidate for magnetic refrigerants in Ericsson-cycle. Aging and partially crystallization of Gd-based BMGs lead to the reduction of both the transition temperature and the peak value of the magnetic entropy change. However, unusual table-like shapes of the MCE are observed for the crystallized samples over wide temperature range. Although the short-range structural change due to long time aging has observable effect on MCE, the structural change induced by microalloying has less influence on MCE compared with that of some crystalline materials. The possible reasons for the good MCE in these BMGs are discussed. It is found that the field dependence of magnetic entropy change follows a power law but the exponents near the transition temperature deviate from the mean field picture, and the random magnetic anisotropy has obvious effect on the field dependence of the magnetic entropy change. (C) 2010 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [50921091]; National Basic Research Program of China [2007CB613904] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41610]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Luo, Q,Wang, WH. Magnetocaloric effect in rare earth-based bulk metallic glasses[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2010,495(1):209. |
| APA | Luo, Q,&Wang, WH.(2010).Magnetocaloric effect in rare earth-based bulk metallic glasses.JOURNAL OF ALLOYS AND COMPOUNDS,495(1),209. |
| MLA | Luo, Q,et al."Magnetocaloric effect in rare earth-based bulk metallic glasses".JOURNAL OF ALLOYS AND COMPOUNDS 495.1(2010):209. |
入库方式： OAI收割
来源：物理研究所
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