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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Anomalous DC electrical conductivity in mixed transition metal ions doped borate glasses
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Anomalous DC electrical conductivity in mixed transition metal ions doped borate glasses

机译：混合过渡金属离子中的异常直流电导率掺杂硼酸盐玻璃

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摘要

A novel series of borate glasses in the composition, xCo(3)O(4) + (50 - x) (V2O5) + 50 B2O2 where x = 0.05 to 0.45 have been prepared by melt quenching technique. X-ray diffraction studies confirmed the non-crystalline nature of the samples. The room temperature density and molar volume varied non-linearly with cobalt concentration. Electrical conductivity and activation energy were determined and both varied non-linearly with cobalt concentration. Conductivity reached minimum and activation energy reached maximum at x = 0.4 of cobalt concentration. This anomalous behavior is due to the enhancement of Anderson localization caused by increase in configurational disorder. Various polaron related parameters were investigated in the light of Mott's SPH model for T theta D/2. The density of states at fermi level was determined using Greaves VRH model which adequately explains conductivity for T theta D/2. The nonlinear variation in various physical parameters with second TMI is attributed to the Mixed transition effect.
机译：通过熔融淬火技术制备了组合物，XCO（3）O（4）+（50- X）（V2O5）+ 50b2O2的新型硼酸硼玻璃系列。 X射线衍射研究证实了样品的非结晶性质。室温密度和摩尔体积与钴浓度无线相同。测定导电性和活化能量，并用钴浓度非线性地变化。电导率达到最小，激活能量在X = 0.4的钴浓度下达到最大值。这种异常行为是由于通过增加配置障碍引起的安德森本地化的增强。根据T＆GT的MOTT的SPH模型研究了各种极化相关参数; Theta D / 2。使用Greaves VRH模型测定FERMI水平处的状态的密度，该模型充分解释了T＆LT; Theta D / 2。具有第二TMI的各种物理参数的非线性变化归因于混合过渡效果。

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