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 i...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.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 50271022.
文摘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.
