期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 540, 期 -, 页码 36-38出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.06.106
关键词
Ceramics; Ferroelectrics; Magnetic materials; Sol-gel preparation
资金
- National Natural Science Foundation of China [51172044]
- National Science Foundation of Jiangsu Province of China [BK2011617]
- Fundamental Research Funds for the Central Universities [NS2012110]
- National Key Projects for Basic Researches of China [2010CB923404]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Southeast University [Seujq201106]
- [NCET-09-0296]
Bi1.04-xYxFeO3 ceramics with x up to 0.30 were prepared by a tartaric acid modified sol-gel method. The crystal structure transformed from rhombohedral (R3c) to orthorhombic (Pn2(1)a) with increasing Y doping concentration, which was confirmed by the X ray diffraction (XRD) and Raman measurements. With increasing Y doping concentration x, the leakage current was effectively suppressed, and the room temperature ferromagnetism was strongly enhanced with increasing x to 0.30. Clear room temperature ferromagnetism with saturate magnetization of about 0.31 emu/g and ferroelectric properties with 25 mu C/cm(2) under electric field of 120 kV/cm have been observed in orthorhombic Bi0.74Y0.30FeO3, suggesting the potential multiferroic applications. (C) 2012 Elsevier B.V. All rights reserved.
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