Crystal and magnetic structure temperature evolution in Ni-Mn-Ga magnetic shape memory martensite

被引：23
|
作者：
Glavatskyy, I. [1 ]
Glavatska, N. [1 ]
Urubkov, I. [1 ]
Hoffman, J. -U. [2 ]
Bourdarot, F. [3 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine
[2] BENSC, Abt NE Gastgrp Tubiingen, Hahn Meitner Inst, D-14109 Berlin, Germany
[3] CEA Grenoble, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 481卷
关键词：
Ni-Mn-Ga; magnetic shape memory; martensite; magnetic structure;
D O I：
10.1016/j.msea.2007.02.139
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The current work presents the original results concerning the temperature evolution of the magnetic and crystal structure of Ni-Mn-Ga magnetic shape memory alloys within the entire temperature interval of the martensite phase. The atomic positions and the correct space group of the 5M martensite unit cell has been derived, which is crucial for the electronic structure calculations. Neutron diffraction studies of the Ni-Mn-Ga alloy, possessing a large magnetic shape memory effect (>5% shear strain), revealed that there are several magnetic transitions in the martensite phase due to the smooth strongly anisotropic temperature dependence of the martensite lattice parameters. (C) 2007 Published by Elsevier B.V.
引用
收藏
页码：298 / 301
页数：4
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