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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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| Cite this article: |
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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.
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| Keywords:
74.62.Dh
71.30.+h
72.80.Ga
66.30.Xj
67.55.Hc
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Published: 01 January 2004
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| PACS: |
74.62.Dh
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(Effects of crystal defects, doping and substitution)
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71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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72.80.Ga
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(Transition-metal compounds)
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66.30.Xj
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(Thermal diffusivity)
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67.55.Hc
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