期刊
SCRIPTA MATERIALIA
卷 67, 期 6, 页码 572-577出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.12.042
关键词
Magnetic properties; Phase transformations; Metals and alloys; Intermetallic compounds
类别
资金
- US Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering
- Iowa State University [DE-ACO2-07CH11358]
Methods were developed to determine the structural entropy contribution to the total isothermal entropy change of materials which undergo a magnetostructural first-order phase transition. The structural entropies range from 4.5 to 45 J kg(-1) K-1 and are proportional to the volume differences of the phases involved in the transition. This correlation allows one to predict new giant magnetocaloric effect materials from crystallographic data. There is a critical magnetic field which must be exceeded to drive the structural transition to completion. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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