Entropy change at the martensitic transformation in ferromagnetic shape memory alloys Ni2+xMn1-xGa

被引：100

作者：

Khovailo, VV ^{[1
]}

Oikawa, K

Abe, T

Takagi, T

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tohoku Ctr, Sendai, Miyagi 9838551, Japan

[2] Tohoku Univ, Inst Fluid Sci, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 93卷 / 10期

关键词：

D O I：

10.1063/1.1556218

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The entropy change DeltaS between the high-temperature cubic phase and the low-temperature tetragonally based martensitic phase of Ni2+xMn1-xGa (x=0-0.20) alloys was studied. The experimental results obtained indicate that DeltaS in the Ni2+xMn1-xGa alloys increases with the Ni excess x. The increase of DeltaS is presumably accounted for by an increase of magnetic contribution to the entropy change. It is suggested that the change in modulation of the martensitic phase of Ni2+xMn1-xGa results in discontinuity of the composition dependence of DeltaS. (C) 2003 American Institute of Physics.

引用

页码：8483 / 8485

页数：3

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