The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films
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<sub>3</sub> (BFO) films have b...
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MDPI AG
2022-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/6/892 |
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| author | Qianqian Yang Xiaolei Wang Kaihua Yang Jinxiang Deng Ruijuan Nie Qingsong Deng Xuegang Chen Hongwei Yang Kailin Xu Furen Wang |
| author_facet | Qianqian Yang Xiaolei Wang Kaihua Yang Jinxiang Deng Ruijuan Nie Qingsong Deng Xuegang Chen Hongwei Yang Kailin Xu Furen Wang |
| author_sort | Qianqian Yang |
| collection | DOAJ |
| description | 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<sub>3</sub> (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. |
| first_indexed | 2024-03-09T13:09:11Z |
| format | Article |
| id | doaj.art-f7c69d326e78491ea53aa887f63035cb |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:09:11Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f7c69d326e78491ea53aa887f63035cb2023-11-30T21:45:05ZengMDPI AGNanomaterials2079-49912022-03-0112689210.3390/nano12060892The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> FilmsQianqian Yang0Xiaolei Wang1Kaihua Yang2Jinxiang Deng3Ruijuan Nie4Qingsong Deng5Xuegang Chen6Hongwei Yang7Kailin Xu8Furen Wang9Department of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaDepartment of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaDepartment of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaDepartment of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics, Peking University, Beijing 100871, ChinaInstitute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, ChinaInstitutes of Physical Science and Information Technology, Anhui University, Hefei 230601, ChinaDepartment of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaDepartment of Physics and Optoelectronics Engineering, Faculty of Science, Beijing University of Technology, Beijing 100124, ChinaSchool of Physics, Peking University, Beijing 100871, ChinaThe 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<sub>3</sub> (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.https://www.mdpi.com/2079-4991/12/6/892BiFeO<sub>3</sub>PTCRsuperconductortransport properties |
| spellingShingle | Qianqian Yang Xiaolei Wang Kaihua Yang Jinxiang Deng Ruijuan Nie Qingsong Deng Xuegang Chen Hongwei Yang Kailin Xu Furen Wang The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films Nanomaterials BiFeO<sub>3</sub> PTCR superconductor transport properties |
| title | The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films |
| title_full | The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films |
| title_fullStr | The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films |
| title_full_unstemmed | The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films |
| title_short | The Positive Temperature Coefficient of Resistivity in BiFeO<sub>3</sub> Films |
| title_sort | positive temperature coefficient of resistivity in bifeo sub 3 sub films |
| topic | BiFeO<sub>3</sub> PTCR superconductor transport properties |
| url | https://www.mdpi.com/2079-4991/12/6/892 |
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