CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Anomalous thermal expansion and spontaneous magnetostriction of Gd2Fe16Cr compound |
Hao Yan-Ming(郝延明)a)†, Tan Ming(谭明)b), Wang Wei(王薇)c), and Wang Fang(王芳)a) |
a Department of Physics, College of Science, Tianjin University of Science and Technology, Tianjin 300222, China; b School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; c Group of Physics, 19th Middle School of Tianjin, Tianjin 300020, China |
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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.
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Received: 24 September 2009
Accepted manuscript online:
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PACS:
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75.80.+q
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(Magnetomechanical effects, magnetostriction)
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65.40.De
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(Thermal expansion; thermomechanical effects)
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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62.20.F-
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(Deformation and plasticity)
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61.66.Dk
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(Alloys )
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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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