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Preparation of PSFO and LPSFO nanofibers by electrospinning and their electronic transport and magnetic properties |
| Ying Su(苏影)†1, Dong-Yang Zhu(朱东阳)1,†, Ting-Ting Zhang(张亭亭)1, Yu-Rui Zhang(张玉瑞)1, Wen-Peng Han(韩文鹏)1, Jun Zhang(张俊)1, Seeram Ramakrishna2, and Yun-Ze Long(龙云泽)1,3,‡ |
1 Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China;
2 Center for Nanofibers & Nanotechnology, Department of Mechanical Engineering, National University of Singapore, Singapore 117574, Singapore;
3 Collaborative Innovation Center for Eco-Textiles of Shandong Province, and State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China |
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Abstract Pr0.5Sr0.5FeO3 (PSFO) and La0.25Pr0.25Sr0.5FeO3 (LPSFO) nanofibers are prepared by electrospinning followed by calcination, and their morphologies, microstructures, electronic transports, and magnetic properties are studied systematically. The temperature-dependent resistance curves of PSFO and LPSFO nanofibers are measured in a temperature range from 300 K to 10 K. With the temperature lowering, the resistance increases gradually and then decreases sharply due to the occurrence of ferromagnetic metal phase. The metal-insulator transition temperatures are about 110 K and 180 K for PSFO and LPSFO nanofibers, respectively. The electronic conduction behavior above the transition temperature can be described by one-dimensional Mott's variable-range hopping (VRH) model. The hysteresis loops and the field-cooled (FC) and zero-field-cooled (ZFC) curves show that both PSFO nanofiber and LPSFO nanofiber exhibit ferromagnetism. Although the doping of La reduces the overall magnetization intensity of the material, it increases the ferromagnetic ratio of the system, which may improve the performance of LPSFO in solid oxide fuel cell.
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Received: 23 September 2021
Revised: 15 November 2021
Accepted manuscript online:
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PACS:
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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75.75.-c
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(Magnetic properties of nanostructures)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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81.05.Je
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(Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.51973100 and 11904193),the Fund from the State Key Laboratory of Bio-Fibers and Eco-Textiles,Qingdao University,China (Grant No.RZ2000003334),and the National Key Research and Development Project,China (Grant No.2019YFC0121402). |
Corresponding Authors:
Yun-Ze Long,E-mail:yunze.long@163.com,yunze.long@qdu.edu.cn
E-mail: yunze.long@163.com,yunze.long@qdu.edu.cn
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| About author: 2021-11-20 |
Cite this article:
Ying Su(苏影), Dong-Yang Zhu(朱东阳), Ting-Ting Zhang(张亭亭), Yu-Rui Zhang(张玉瑞), Wen-Peng Han(韩文鹏), Jun Zhang(张俊), Seeram Ramakrishna, and Yun-Ze Long(龙云泽) Preparation of PSFO and LPSFO nanofibers by electrospinning and their electronic transport and magnetic properties 2022 Chin. Phys. B 31 057305
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