摘要
We investigate the thermal expansion property of the Tb2Fe14Cr3 compound by means of The result shows that the Tb2Fe14Cr3 compound has a hexagonal Th2Ni17-type structure x-ray diffraction. 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^-5 K^-1. In the temperature range 493-692K, the coefficient of the average thermal expansion is α^- = 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.
We investigate the thermal expansion property of the Tb2Fe14Cr3 compound by means of The result shows that the Tb2Fe14Cr3 compound has a hexagonal Th2Ni17-type structure x-ray diffraction. 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^-5 K^-1. In the temperature range 493-692K, the coefficient of the average thermal expansion is α^- = 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.
基金
Supported by the National Natural Science Foundation of China under Grant No 50271022.
MAGNETOSTRICTION
