Neutron study of the martensitic transformation in Ni-Fe-Ga alloys

被引：9

作者：

Gutierrez, J.

Lazpita, P.

Siruguri, V.

Barandiaran, J. M.

Henry, P.

Chernenko, V. A.

Kanomata, T.

机构：

[1] Univ Basque Country, Dept Elect, E-48080 Bilbao, Spain

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[3] Inst Magnetism, UA-03142 Kiev, Ukraine

[4] Tohoku Gakuin Univ, Dept Appl Phys, Tagajo, Miyagi 9858537, Japan

来源：

INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS | 2006年 / 23卷 / 1-2期

关键词：

ferromagnetic shape memory alloys; martensitic transformation; neutron diffraction characterization; magnetic properties;

D O I：

10.3233/JAE-2006-719

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present results of an extensive neutron diffraction study of the martensitic transformation in Shape Memory Alloys of nominal composition Ni55-xFe19+xGa26 (x=0, 1, 2) at. % transforming close to room temperature. The x=0 sample shows a martensitic transformation temperature T-M approximate to 250 K and Curie temperature T-C approximate to 289 K. Neutron measurements for this alloy were performed between 300 K (austenite phase) and 150 K (martensitic phase). At temperatures T > T-C we have found the coexistence of two phases: an L2(1) phase with space group Fm3m and cell parameter a=5.730A and a gamma-fcc with cubic symmetry and with cell parameter a=3.586A This second phase was also detected by magnetic measurements, giving rise to a second Curie temperature of about 363 K.

引用

页码：71 / 74

页数：4

共 6 条

[1]

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