Jerky magnetic noises generated by cyclic deformation of martensite in Ni2MnGa single crystalline shape memory alloys

被引：7
|
作者：
Daroczi, Lajos [1 ]
Gyoengyoesi, Szilvia [1 ]
Toth, Laszlo Z. [1 ]
Szabo, Sandor [1 ]
Beke, Dezso L. [1 ]
机构：
[1] Univ Debrecen, Dept Solid State Phys, H-4010 Debrecen, Hungary
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 04期
关键词：
TRANSFORMATION; EMISSION; PHASE;
D O I：
10.1063/1.4907227
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It is shown that during periodic deformation of martensitic Ni2MnGa single crystalline alloy jerky magnetic noises are emitted. Above a threshold limit in the deformation amplitude, the noise energy per deformation cycle showed increasing tendency with increasing deformation. Energy and amplitude probability distributions of the noise were characterized by power law functions. The energy exponents were independent of the deformation amplitude in the investigated range. The decrease of the noise energy as well as power exponents with increasing magnetic field was interpreted by the decrease of the multiplicity of the martensite variants. (C) 2015 AIP Publishing LLC.
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页数：4
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