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Low-temperature conducting channel switching in hybrid Fe_3O_4/SiO_2-Si structures

机译:Fe_3O_4 / SiO_2 / n-Si混合结构中的低温传导通道切换

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摘要

The carrier transport properties of the polycrystalline magnetite (Fe_3O_4) films grown on an n-type Si substrate with 5 nm-thick SiO_2 have been investigated between 80 and 300 K in current-in-plane geometry. It was established that at temperature decrease to about 120 K, the resistivity of thin Fe_3O_4 films increases up to a peak value and then abruptly drops. This process is attended by a change in the shape of the current-voltage characteristics from the linear at 300 K to the S-type at 80 K. The observed peculiarities are explained by conducting channel switching from the Fe_3O_4 film to the Si substrate via the field-assisted tunneling of carriers through the composite insulating layer consisting of highly resistive Fe_3O_4 and tunnel SiO_2.
机译:已经研究了在80-300 K的平面电流中研究了在厚度为5 nm的SiO_2的n型Si衬底上生长的多晶磁铁矿(Fe_3O_4)薄膜的载流子传输特性。可以确定的是,在温度降低到约120 K时,Fe_3O_4薄膜的电阻率增加到一个峰值,然后突然下降。该过程伴随着电流-电压特性的形状从300 K的线性变化到80 K的S型变化。观察到的特殊性是通过从Fe_3O_4薄膜到硅衬底的沟道转换来解释的。通过高电阻Fe_3O_4和隧道SiO_2组成的复合绝缘层对载流子进行场辅助隧穿。

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  • 来源
    《Materials Science and Engineering》 |2016年第9期|33-36|共4页
  • 作者单位

    Institute of Automation and Control Processes, FEB RAS, 5 Radio Street, 690041 Vladivostok, Russia;

    Institute of Automation and Control Processes, FEB RAS, 5 Radio Street, 690041 Vladivostok, Russia,School of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia;

    Institute of Automation and Control Processes, FEB RAS, 5 Radio Street, 690041 Vladivostok, Russia,School of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia;

    Institute of Automation and Control Processes, FEB RAS, 5 Radio Street, 690041 Vladivostok, Russia,School of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia;

    Institute of Automation and Control Processes, FEB RAS, 5 Radio Street, 690041 Vladivostok, Russia,School of Natural Sciences, Far Eastern Federal University, 690950 Vladivostok, Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Magnetite; Thin films; Hybrid structure; Carrier transport;

    机译:磁铁矿;薄膜;混合结构;承运人运输;

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