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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Electrical transport properties of cobalt-doped MgAl2O4 nanoparticles
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Electrical transport properties of cobalt-doped MgAl2O4 nanoparticles

机译：钴掺杂MgAl2O4纳米粒子的电气传输性能

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摘要

The electrical transport properties of MgAl2-xCoxO4 (where x = 0.0, 0.5, 1.0, 1.5, 2.0) were investigated at room temperature. The dielectric behavior of the samples, and the contribution of the grains and the grain boundary regions to the electric response of the samples were observed using impedance spectroscopy in the frequency range of 20 Hz to 2 MHz. The DC conduction behavior was studied by measuring current density J against electric field E. It was observed that the grains and grain boundaries both contribute equally to the variation in electric response caused by changing the dopant concentration of cobalt in MgAl2O4. The combined Z '' and M '' spectroscopic plots indicated the presence of small polaron hopping conduction in the grain region of the samples. Moreover, the 25% doped sample showed minimum conductivity among all samples, which was two orders of magnitude less than that of the pure sample.
机译：在室温下研究了MgAl 2-XcoxO4的电气传输性能（其中x = 0.0,0.5,1.0,1.5,2.0）。 使用20Hz至2MHz的频率范围内的阻抗谱观察样品的介电行为和晶粒和晶粒边界区对样品的电响应的贡献。 通过测量电流密度J对电场E测量的直流传导行为。观察到晶粒和晶界两者同样促进通过改变MgAl2O4中钴掺杂剂浓度引起的电响应的变化。 组合的Z'和M'的光谱图表明存在于样品的晶粒区中的小极化型跳跃传导。 此外，25％掺杂的样品在所有样品中显示出最小的导电性，这是比纯样品的两个数量级。

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