Effect of Ca Doping on the Structure and Magnetic and Electronic Properties of La1 − xCaxCr0.8Cu0.2O3 (x = 0~0.3)
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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.
KeywordsLanthanum chromite oxides Magnetic proprieties Electronic properties Sol-gel method
Yongliang Chen gratefully acknowledges Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Ministry of Education.
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 11104224, 11004162) and the Research Fund for the Doctoral Program of Higher Education of China (20110184120029).
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