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Establishing room-temperature multiferroic behaviour in bismuth-based perovskites
Cao, Jun Yang, Bin Smith, Graham Mahajan, Amit Zhang, Hangfeng Lin, Yunyin Yu, Chuying Koval, Vladimir Zhang, Dou Shi, Yu
Cao, Jun
Yang, Bin
Smith, Graham
Mahajan, Amit
Zhang, Hangfeng
Lin, Yunyin
Yu, Chuying
Koval, Vladimir
Zhang, Dou
Shi, Yu
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Publication Date
2024-11-26
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Article - AAM
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Abstract
In the search of single-phase multiferroic materials at room temperature, a ceramic system with composition 0.5(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-0.5BiFe0.8Mn0.2O3 (BNT-6BT-5BFO2M) was fabricated via the solid-state reaction route, and its crystal structure, dielectric, ferroelectric, and magnetic properties were studied. The results indicate that the ceramic can be considered a single-phase perovskite system with ferroelectric and ferromagnetic characteristics at room temperature. The ferroelectricity is evidenced by the switching of ferroelectric domains, as imaged by piezoresponse force microscopy (PFM). The presence of a weak ferromagnetism is manifested by a non-negligible remnant magnetization in the magnetization-magnetic field loops. The spontaneous net magnetization is mediated by the presence of Mn4+ ions, which may introduce ferromagnetic Fe3+-O-Mn4+ double-exchange interactions in the system. The PFM images taken during the application of a magnetic field of 2000 Oe revealed that the ferroelectric domain structure at room temperature can be significantly influenced by the magnetic field, reflecting the presence of a magnetoelectric effect that allows the occurrence of magnetic field-induced polarization reorientation.
Citation
Cao, J., Yang, B., Smith, G., Mahajan, A., Zhang, H., Lin, Y., Yu, C., Koval, V., Zhang, D., Shi, Y., Jia, C., & Viola, G. (2024). Establishing room-temperature multiferroic behaviour in bismuth-based perovskites. Materials & Design, 248, article-number 113498. https://doi.org/10.1016/j.matdes.2024.113498
Publisher
Elsevier
Journal
Materials & Design
Research Unit
DOI
10.1016/j.matdes.2024.113498
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Article
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Series/Report no.
ISSN
0264-1275
EISSN
1873-4197
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Sponsors
Science and Technology Major Project of Hunan Province (2021SK1020); College of Chemistry and Chemical Engineering, Hunan University; National Key R&D Program of China (No. 2021YFB2012100); State Key Laboratory of Powder Metallurgy, Central South University; Grant Agency of the Slovak Academy of Sciences (grant no. VEGA 2/0034/23).