,Thermal Expansion Anomaly of Tb2Fe14Cr3 Compound

• 作 者: HAO Yan-Ming HE Xiao-Hong AN Li-Qun Fu Bin
• 机 构: College of Science,Tianjin University of Science and Technology,13th Street Teda,Tianjin,300457“,”De
• 出 处: 中国物理快报(英文版)
• 发表日期: 2008年2期

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 (a)=-2.82×10-5 K-1.In the temperature range 493-692K,the coefficient of the average thermal expansion is (a)=1.59×10-5 K-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.