Anomalous thermal expansion and spontaneous magnetostriction of Gd2Fe16Cr compound

doi:10.1088/1674-1056/19/6/067502

Abstract The structural and the magnetic properties of Gd₂Fe₁₆Cr compound are investigated by x-ray diffraction and magnetization measurements. The Gd₂Fe₁₆Cr compound has a rhombohedral Th₂Zn₁₇-type structure. There exist an anisotropic strong spontaneous magnetostriction and a negative thermal expansion in the magnetic state of Gd₂Fe₁₆Cr compound. The average thermal expansion coefficient $\bar {\alpha }=-7.03\times 10^{ - 6}$/K in a temperature range of 294--454 K and $\bar {\alpha }=-1.31\times 10^{ - 5}$/K in 454--572 K are obtained. The spontaneous magnetostrictive deformation and the Curie temperature are discussed.

Keywords: x-ray diffraction intermetallic compound negative thermal expansion magnetostriction

Received: 24 September 2009
Accepted manuscript online:

PACS:	75.80.+q	(Magnetomechanical effects, magnetostriction)
	65.40.De	(Thermal expansion; thermomechanical effects)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
	62.20.F-	(Deformation and plasticity)
	61.66.Dk	(Alloys )

Fund: Project supported by the National Natural Science Foundation of China (Grant No.~50871074), and the Natural Science Foundation of Tianjin University of Science and Technology, China (Grant No.~0200153).

Cite this article:

Hao Yan-Ming(郝延明), Tan Ming(谭明), Wang Wei(王薇), and Wang Fang(王芳) Anomalous thermal expansion and spontaneous magnetostriction of Gd₂Fe₁₆Cr compound 2010 Chin. Phys. B 19 067502

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Anomalous thermal expansion and spontaneous magnetostriction of Gd2Fe16Cr compound

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Anomalous thermal expansion and spontaneous magnetostriction of Gd₂Fe₁₆Cr compound