Chin. Phys. Lett.  2004, Vol. 21 Issue (1): 179-182    DOI:
Original Articles |
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
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LIU Xiao-Jun, HUANG Qiao-Jian, XU Sheng et al  2004 Chin. Phys. Lett. 21 179-182
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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.


Keywords: 74.62.Dh      71.30.+h      72.80.Ga      66.30.Xj      67.55.Hc     
Published: 01 January 2004
PACS:  74.62.Dh (Effects of crystal defects, doping and substitution)  
  71.30.+h (Metal-insulator transitions and other electronic transitions)  
  72.80.Ga (Transition-metal compounds)  
  66.30.Xj (Thermal diffusivity)  
  67.55.Hc  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I1/0179
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LIU Xiao-Jun
HUANG Qiao-Jian
XU Sheng
ZHANG Shu-Yi
LUO Ai-Hua
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