期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 48, 期 39, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/48/39/395302
关键词
BiFeO3; ceramics; multiferroics; ferroelectric polarization; magnetization
资金
- National Science Foundation of China [51101063, 51272078, 51332007, 51431006]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1243]
- Project for Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme
- Program for International Innovation Cooperation Platform of Guangzhou [2014J4500016]
- Scientific Research Foundation of Graduate School of South China Normal University
In this work, Sm and Sc co-doped Bi1-xSmxFe1-yScyO3 (x = 0.00-0.20; y = 0.03) ceramics are fabricated by a rapid liquid phase sintering method, in order to develop single-phase multiferroics with large magnetization and polarization. X-ray diffraction and Raman spectroscopic studies reveal that the ceramics are single-phase with a structural transition from rhombohedral to orthorhombic structures near x = 0.15. Electric and magnetic measurement results indicate that the transition significantly enhances the multiferroic properties, which stems from the Sm/Sc doping induced collapse of space-modulated spin structure and internal structural distortion. At an optimized composition of Bi0.85Sm0.15Fe0.97Sc0.03O3 (x = 0.15), a remanent polarization of 16.5 mu C cm(-2), a magnetization 0.2020 emu g(-1), and a magnetodielectric effect of 0.46% can be obtained. These results clearly demonstrate a potential application for Sm/Sc doped BiFeO3 ceramics in the field of multiferroic devices.
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