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BiFeO 薄膜中电阻率的正温度系数

The Positive Temperature Coefficient of Resistivity in BiFeO Films.

作者信息

Yang Qianqian, Wang Xiaolei, Yang Kaihua, Deng Jinxiang, Nie Ruijuan, Deng Qingsong, Chen Xuegang, Yang Hongwei, Xu Kailin, Wang Furen

机构信息

Department of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, China.

School of Physics, Peking University, Beijing 100871, China.

出版信息

Nanomaterials (Basel). 2022 Mar 8;12(6):892. doi: 10.3390/nano12060892.

DOI:10.3390/nano12060892
PMID:35335705
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8949239/
Abstract

The use of lead-free ceramic film materials with positive temperature coefficient of resistivity (PTCR) is widespread in temperature heaters and sensors in micro-electromechanical systems. In this research, the out of plane transport properties of the BiFeO (BFO) films have been studied. Surprisingly, PTCR was found in the BFO ceramic films due to the strongly correlated interaction between the multiferroic material BFO and the superconductor YBCO perovskite oxides. To our knowledge, this is the first report on the PTCR effect of BFO films. The BFO/YBCO interface and the bulk conductivity of BFO are important for the PTCR effect, as they make it possible to compare the transport properties of Au/BFO/YBCO- and YBCO/BFO/YBCO-type structures. PTCR was observed in Au/BFO/YBCO at a bias voltage of more than 2 V, but not in the YBCO/BFO/YBCO, even with a 40 V bias voltage. PTCR was found after BFO breakdown of a YBCO/BFO/YBCO capacitor. This indicated that the conductivity of BFO is critical for PTCR. The dependence of PTCR on the superconducting transition temperature illustrates that a cooper-pair can be injected into BFO. Our work presents a method by which to produce a lead-free ceramic film material with PTCR.

摘要

具有正电阻温度系数（PTCR）的无铅陶瓷薄膜材料在微机电系统的温度加热器和传感器中有着广泛的应用。在本研究中，对BiFeO（BFO）薄膜的面外输运特性进行了研究。令人惊讶的是，由于多铁性材料BFO与超导YBCO钙钛矿氧化物之间强烈的关联相互作用，在BFO陶瓷薄膜中发现了PTCR。据我们所知，这是关于BFO薄膜PTCR效应的首次报道。BFO/YBCO界面和BFO的体电导率对PTCR效应很重要，因为它们使得比较Au/BFO/YBCO型和YBCO/BFO/YBCO型结构的输运特性成为可能。在Au/BFO/YBCO中，当偏置电压超过2 V时观察到了PTCR，但在YBCO/BFO/YBCO中，即使施加40 V的偏置电压也未观察到。在YBCO/BFO/YBCO电容器的BFO击穿后发现了PTCR。这表明BFO的电导率对PTCR至关重要。PTCR对超导转变温度的依赖性表明，库珀对可以注入到BFO中。我们的工作提出了一种制备具有PTCR的无铅陶瓷薄膜材料的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/41b83a15db3e/nanomaterials-12-00892-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/6e8983840804/nanomaterials-12-00892-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/633d2aa11bb6/nanomaterials-12-00892-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/5b86e4ea8499/nanomaterials-12-00892-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/45f0efacb402/nanomaterials-12-00892-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/fc6060762763/nanomaterials-12-00892-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/e3efe01db3bf/nanomaterials-12-00892-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/41b83a15db3e/nanomaterials-12-00892-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/6e8983840804/nanomaterials-12-00892-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/633d2aa11bb6/nanomaterials-12-00892-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/5b86e4ea8499/nanomaterials-12-00892-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/45f0efacb402/nanomaterials-12-00892-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/fc6060762763/nanomaterials-12-00892-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/e3efe01db3bf/nanomaterials-12-00892-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/35f7/8949239/41b83a15db3e/nanomaterials-12-00892-g007.jpg

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本文引用的文献

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Quasiparticle tunnel electroresistance in superconducting junctions.超导结中的准粒子隧道电阻
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