Resonant ultrasound spectroscopy - a tool to probe magneto-elastic properties of ferromagnetic shape memory alloys

被引：15
|
作者：
Heczko, Oleg [1 ]
Seiner, Hanus [2 ]
Sedlak, Petr [2 ]
Kopecek, Jaromir [1 ]
Kopecky, Vit [1 ]
Landa, Michal [2 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic
[2] Acad Sci Czech Republ, Inst Thermomech, Prague 18200 8, Czech Republic
来源：
EUROPEAN PHYSICAL JOURNAL B | 2013年 / 86卷 / 02期
关键词：
ELASTIC PROPERTIES; BEHAVIOR;
D O I：
10.1140/epjb/e2012-30937-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Resonant ultrasound spectroscopy (RUS) was used to investigate the changes of elastic properties induced by magnetic field in magnetic shape memory alloys Ni-Mn-Ga and Co-Ni-Al. In contrast to large magneto-elastic response of Ni2MnGa austenite, there is only very weak response of Co-Ni-Al. This indicates that the austenite phase of Ni-Mn-Ga can have a privileged position and this may be a reason for the existence of magnetic shape memory effect. In contrast to austenite, the magneto-elastic response in Ni-Mn-Ga martensite is very small with large damping due to existence of twin boundaries. The measurement showed that RUS can be a powerful method to probe magneto-elastic properties of shape memory alloys.
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页数：5
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