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
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
摘要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.
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.
[1] Evans J S O, Hu Z, Jorgensen J D, Argyriou D N, Short S andSleight A W 1997 Science 75 61 [2] Lagarec K and Rancourt D G 2000 Phys. Rev. B 62 978 [3] Hao Y M, Gao Y, Wang B W, Qu J P, Li Y X, Hu J F and Deng J C 2001 Appl. Phys Lett. 78 3277 [4] Wang J L, Campbell S J, Tegus O, Marquina C and Ibarra M R 2007 Phys. Rev. B 75 174423 [5] Hao Y M, Zhao M and Zhou Y 2005 J. Appl. Phys. 98 076101 [6] Wang H Y, Zhao M, Gao Y et al 2006 Transactions ofNonferrous Metals Society of China 16 1331 [7] Hao Y M, Zhou Y and Zhao M 2005 J. Appl. Phys. 97 116102 [8] Hao Y M, Zhao M, Zhou Y and Hu J F 2005 Scripta Mater. 53 357
2008, Vol. 25 
