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Thermal Expansion Anomaly of Tb2Fe14Cr3 Compound |
HAO Yan-Ming1;HE Xiao-Hong2;AN Li-Qun1;FU Bin3 |
1College of Science, Tianjin University of Science and Technology, 13th Street Teda, Tianjin 3004572Department of Applied Physics, Taiyuan University of Technology, Taiyuan 0300243College of Materials Science, Beijing University of Science and Technology, Being 100083 |
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Cite this article: |
HAO Yan-Ming, HE Xiao-Hong, AN Li-Qun et al 2008 Chin. Phys. Lett. 25 661-662 |
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Abstract We investigate the thermal expansion property of the Tb2Fe14Cr3 compound by means of x-ray diffraction. The result shows that the Tb2Fe14Cr3 compound has a hexagonal Th2Ni17-type structure. Negative thermal expansion is found in the Tb2Fe14Cr3 compound from 296 to 493K by x-ray dilatometry. The coefficient of the average thermal expansion is α=-2.82 × 10-5K-1. In the temperature range 493--692K, the coefficient of the average thermal expansion is α=1.59 × 10-5K-1. The physical mechanism of thermal expansion anomaly of the Tb2Fe14Cr3 compound is discussed according to the temperature dependence of magnetization measured by a superconducting quantum interference device.
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Keywords:
65.40.De
65.70.+y
61.10.-i
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Received: 20 November 2007
Published: 30 January 2008
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