Domain Structures Across the Martensitic Transformation in Ni2+xMn1-xGa

被引：2
|
作者：
Jain, Deepti [1 ]
Banik, Soma [1 ]
Chandra, L. S. Sharath [1 ]
Barman, S. R. [1 ]
Nath, R. [1 ]
Ganesan, V. [1 ]
机构：
[1] UGC DAE Consortium Sci Res, Indore 452001, MP, India
来源：
FERROMAGNETIC SHAPE MEMORY ALLOYS II | 2010年 / 635卷
关键词：
Ni(2)MnGa; Optical Microscopy; MFM; Ferromagnetic Shape memory alloys; NI-MN-GA; FIELD-INDUCED STRAIN; MAGNETIC DOMAINS; HEUSLER ALLOY; NI2MNGA; MEMORY; COOCCURRENCE; TRANSITIONS; FILMS;
D O I：
10.4028/www.scientific.net/MSF.635.69
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Evolution of domain structures across the martensitic transition (T(m)) in the ferromagnetic shape memory alloy system Ni-Mn-Ga is studied using an optical microscope with a temperature variation. Compositions chosen have T(m) < T(c), T(m) = T(c) and T(m) > T(c), (T(c)=Curie temperature) so that one can compare the nature of martensitic domains. There are no appreciable domain structures when T(m) < T(c) as compared to the one with T(m) > T(c). However, giant morphological changes in the form of appearance of well-developed domains that are propagating with different directions are seen for the composition in which T(m)=T(c). The results are discussed in the light of Magnetic Force Microscopy observations as well as giant entropy changes known to occur on samples with co-occurrence of T(m) and T(c).
引用
收藏
页码：69 / 74
页数：6
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