Insulator-Metal Transition due to La Doping in Double Perovskite Sr2MnMoO6 |
| |
作者姓名: | 刘晓峻 黄巧建 徐胜 张淑仪 罗爱华 |
| |
作者单位: | [1]InstituteofAcousticsandLaboratoryofModernAcoustics,NanjingUniversity,Nanjing210093 [2]DepartmentofCrystallineMaterialsScience,NagoyaUniversityNagoya464-8601,Japan |
| |
摘 要: | 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 La^3 for Sr^2 ions occupy mainly the conduction Mo-4d band. According to the insulator to metal phase transition, the thermal diffusivity of Sr2-xLaxMnMoO6 enhances from 0.33cm^2/s at x=0.0 to 0.49cm^2/s at x=0.4. We further investigate the La doping effects on the lattice and magnetic properties.
|
关 键 词: | 绝缘金属 镧掺杂 钙钛矿结构 热扩散率 电阻系数 |
本文献已被 维普 等数据库收录! |
|