Effect of Ca Doping on the Structure and Magnetic and Electronic Properties of La1 − xCaxCr0.8Cu0.2O3 (x = 0~0.3)

Abstract

A series of La1 − xCaxCr0.8Cu0.2O3 samples were successfully prepared by sol-gel method, and their crystal structures were refined by using X-ray powder diffraction data. All samples had orthorhombic structure with a space group Pbnm. Two magnetic transitions were observed for all of samples, and the paramagnetism-antiferromagnetism transition temperature decreased, and the antiferromagnetism-ferromagnetism transition temperature increased with increasing Ca content. Moreover, Cu and Ca co-doping improved conductivity and active energy.