Insulator--Metal Transition due to La Doping in Double Perovskite Sr2MnMoO6
LIU Xiao-Jun1,2, HUANG Qiao-Jian1, XU Sheng2, ZHANG Shu-Yi1, LUO Ai-Hua1
1Institute of Acoustics and Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093
2Department of Crystalline Materials Science, Nagoya University, Nagoya 464-8601, Japan
Insulator--Metal Transition due to La Doping in Double Perovskite Sr2MnMoO6
LIU Xiao-Jun1,2;HUANG Qiao-Jian1;XU Sheng2;ZHANG Shu-Yi1;LUO Ai-Hua1
1Institute of Acoustics and Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093
2Department of Crystalline Materials Science, Nagoya University, Nagoya 464-8601, Japan
Abstract： Resistivity, thermal diffusivity, lattice and magnetic properties of double perovskite Sr2-xLaxMnMoO6 are investigated with systematic change of La doping concentration x from 0.0 to 0.4. The insulator to metal phase transition is observed with increasing x above 0.3, suggesting that the extra electrons via substitution of La3+ for Sr2+ ions occupy mainly the conduction Mo-4d band. According to the insulator to metal phase transition, the thermal diffusivity of Sr2-xLaxMnMoO6 enhances from 0.33 cm2/s at x = 0.0 to 0.49 cm2/s at x = 0.4. We further investigate the La doping effects on the lattice and magnetic properties.
LIU Xiao-Jun;HUANG Qiao-Jian;XU Sheng;ZHANG Shu-Yi;LUO Ai-Hua. Insulator--Metal Transition due to La Doping in Double Perovskite Sr2MnMoO6[J]. 中国物理快报, 2004, 21(1): 179-182.
LIU Xiao-Jun, HUANG Qiao-Jian, XU Sheng, ZHANG Shu-Yi, LUO Ai-Hua. Insulator--Metal Transition due to La Doping in Double Perovskite Sr2MnMoO6. Chin. Phys. Lett., 2004, 21(1): 179-182.
2004, Vol. 21 
