Structural transformations in Mn2NiGa due to residual stress

被引：57

作者：

Singh, Sanjay ^{[1
]}

Maniraj, M. ^{[1
]}

D'Souza, S. W. ^{[1
]}

Ranjan, R. ^{[2
]}

Barman, S. R. ^{[1
]}

机构：

[1] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India

[2] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 08期

关键词：

ferromagnetic materials; gallium alloys; internal stresses; manganese alloys; nickel alloys; shape memory effects; X-ray diffraction; FIELD-INDUCED STRAIN; MAGNETIC SHAPE-MEMORY; CRYSTAL-STRUCTURE; MARTENSITIC-TRANSFORMATION; ALLOYS; POWDER;

D O I：

10.1063/1.3318461

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Powder x-ray diffraction study of Mn2NiGa ferromagnetic shape memory alloy shows the existence of a 7M monoclinic modulated structure at room temperature (RT). The structure of Mn2NiGa is found to be highly dependent on residual stress. For higher stress, the structure is tetragonal at RT, and for intermediate stress it is 7M monoclinic. However, only when the stress is considerably relaxed, the structure is cubic, as is expected at RT since the martensitic transition temperature is 230 K.

引用

页数：3

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