Field and temperature induced colossal strain in Gd5(SixGe1-x)4

被引：17

作者：

Hadimani, R. L. ^{[1
]}

Bartlett, P. A. ^{[1
]}

Melikhov, Y. ^{[1
]}

Snyder, J. E. ^{[1
]}

Jiles, D. C. ^{[1
]}

机构：

[1] Cardiff Univ, Sch Engn, Wolfson Ctr Magnet, Cardiff CF243AA, S Glam, Wales

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2011年 / 323卷 / 05期

关键词：

Gd-5(SixGe1-x)(4); Magnetostriction; Magnetocaloric effect; Rare-earth alloy; TRANSITION;

D O I：

10.1016/j.jmmm.2010.10.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Gd-5(SixGe(1-x))(4), known for its giant magnetocaloric effect, also exhibits a colossal strain of the order of 10,000 ppm for a single crystal near its coupled first-order magnetic-structural phase transition, which occurs near room temperature for the compositions 0.41 <= x <= 0.575. Such colossal strain can be utilised for both magnetic sensor and actuator applications. In this study, various measurements have been carried out on strain as a function of magnetic field strength and as a function of temperature on single crystal Gd5Si2Ge2 (x=0.5), and polycrystalline Gd5Si1.95Ge2.05 (x=0.487) and Gd5Si2.09Ge1.91 (x=0.52). Additionally a giant magnetostriction/thermally induced strain of the order of 1800 ppm in polycrystalline Gd5Si2.09Ge1.91 was observed at its first order phase transition on varying temperature using a Peltier cell without the use of bulky equipment such as cryostat or superconducting magnet. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：532 / 534

页数：3

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