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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Rectifying behaviours of heterojunctions composed of manganites with different resistive properties
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Rectifying behaviours of heterojunctions composed of manganites with different resistive properties

机译：具有不同电阻特性的锰矿组成的异质结的整流行为

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摘要

Oxide heterojunctions composed of manganite films of different tolerance factors and SrTiO3 : Nb are fabricated and their rectifying properties are experimentally studied. The current-voltage characteristics of the junctions are found to be dominated by diffusion current at high temperatures and by tunnelling current at low temperatures. Further analyses on the rectifying behaviours of the junctions indicate the occurrence of a built-in voltage independent of manganites, despite the great resistivity change of the manganites and the metal-to-insulator transition above 350 K ( for La0.67Sr0.33MnO3) and similar to 87K ( for La0.29Pr0.38Ca0.33MnO3). In contrast, the increase in the Nb content causes a reduction of the built-in voltage by similar to 0.2 eV. The presence of the depletion layer insensitive to the phase transition of the manganites is believed to be responsible for the present observations.
机译：制备了由不同耐受系数的锰铁矿薄膜和SrTiO3：Nb组成的氧化物异质结，并对其整流性能进行了实验研究。发现结的电流-电压特性主要由高温下的扩散电流和低温下的隧穿电流决定。对结的整流行为的进一步分析表明，尽管锰酸盐的电阻率发生了很大的变化，并且在350 K以上（对于La0.67Sr0.33MnO3）和金属-绝缘体的转变，但仍存在独立于锰酸盐的内置电压。类似于87K（对于La0.29Pr0.38Ca0.33MnO3）。相反，Nb含量的增加会使内建电压降低约0.2 eV。认为对锰的相变不敏感的耗尽层的存在是造成本观察结果的原因。

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