Entropy change and effect of magnetic field on martensitic transformation in a metamagnetic Ni-Co-Mn-In shape memory alloy

被引：127
|
作者：
Kustov, S. [1 ]
Corro, M. L. [1 ]
Pons, J. [1 ]
Cesari, E. [1 ]
机构：
[1] Univ Illes Balears, Dept Fis, E-07122 Palma de Mallorca, Spain
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 19期
关键词：
cobalt alloys; Curie temperature; entropy; ferromagnetic materials; heat treatment; indium alloys; manganese alloys; martensitic transformations; metamagnetism; nickel alloys; shape memory effects; ATOMIC ORDER;
D O I：
10.1063/1.3130229
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied the entropy change and the shift of the martensitic transformation temperatures with magnetic field in samples of a polycrystalline Ni-Co-Mn-In alloy having different degrees of long-range atomic order due to different heat treatments. We found, for the samples of the same composition, strong variations of the entropy change with the degree of atomic order, mediated by the difference between the Curie and martensitic transformation temperatures. Calculations of the field-induced shift of the transformation using data of entropy variations show good agreement with experimental results.
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页数：3
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