Transport, magnetic and structural investigations of Co-Ni-Al shape memory alloy

被引：23

作者：

Chatterjee, S. ^{[1
]}

Thakur, M. ^{[1
]}

Giri, S. ^{[1
]}

Majumdar, S. ^{[1
]}

Deb, A. K. ^{[2
]}

De, S. K. ^{[2
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India

[2] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 456卷 / 1-2期

关键词：

shape memory alloy; magnetically ordered materials;

D O I：

10.1016/j.jallcom.2007.02.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The transport, magnetic and structural properties of the ferromagnetic shape memory alloy with nominal composition Co1.28Ni1.17Al have been investigated. The alloy shows long range ferromagnetic order below 269 K. The anomaly due to the martensitic transition is observed in the resistivity and magnetization data in the temperature range around 175 K, which is associated with clear thermal hysteresis. A significant magneto-thermal irreversibility between the zero-field-cooled and the field-cooled data is observed below the martensitic start temperature. The structural change is confirmed by temperature dependent X-ray diffraction, and our analysis indicate that both martensite and austenite phases mutually coexist in the region of hysteresis. Existence of distinct minor hysteresis loops in the resistivity data is also in accordance with a metastable region of phase coexistence across the martensitic transition. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：96 / 100

页数：5

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