Coupled magnetoelastic waves in ferromagnetic shape-memory alloys

被引：8
|
作者：
Bar'yakhtar, V. G. [1 ]
Danilevich, A. G. [1 ]
L'vov, V. A. [1 ,2 ]
机构：
[1] Inst Magnetism, UA-03142 Kiev, Ukraine
[2] Taras Shevchenko Univ, Dept Radiophys, UA-01601 Kiev, Ukraine
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 13期
关键词：
MAGNETOSTRICTION; TRANSFORMATIONS; RESONANCE; NI2MNGA;
D O I：
10.1103/PhysRevB.84.134304
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The theory of the spectra of coupled magnetoelastic waves in ferromagnetic shape-memory alloys (FSMA) is developed. The possibility of an abnormally strong coupling of spin waves with the soft elastic mode at approaching the martensitic transformation (MT) temperature is disclosed. In particular the magnetoelastic waves in Ni-Mn-Ga single crystals are considered. A considerable (by an order of magnitude) reduction of the shear elastic modulus and an appropriate lowering of the transversal velocity of sound in the applied magnetic field are predicted. Optimum conditions for the experimental observation of the predicted effects are specified.
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收藏
页数：5
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