中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
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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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