Effect of Compressive Load on Magnetic Shape Memory Effect in Ni-Mn-Ga Single Crystal

被引：1
|
作者：
Richterova, K. [1 ]
Drahokoupil, J. [2 ]
Kopecky, V. [1 ]
Dragounova, K. [2 ]
Landa, M. [3 ]
Heczko, O. [1 ]
机构：
[1] Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic
[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague 12000 2, Czech Republic
[3] ASCR, Inst Thermomech, Prague 18200 8, Czech Republic
来源：
ACTA PHYSICA POLONICA A | 2015年 / 128卷 / 04期
关键词：
MARTENSITE; ALLOYS; FIELD;
D O I：
10.12693/APhysPolA.128.704
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigated the effect of large compressive stress on magnetic shape memory effect in modulated 10M martensite of Ni-Mn-Ga Heusler alloy. The single crystalline sample deformed approximately elastically up to highest load 540 MPa. Structural and microstructural changes of a single crystal were analysed by X-ray diffraction 2D scan mapping in 2 theta and omega. Although the crystal structure, lattice cell parameters, and twinned microstructure (a/b and modulation twinning) exhibited only small changes after the loading, the volume of the sample undergoing the magnetically induced reorientation decreased sharply while magnetic field necessary for the reorientation gradually increased. The extrapolation suggested that no magnetically induced reorientation might occur after compression of about 1 GPa.
引用
收藏
页码：704 / 708
页数：5
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