Large polarization and enhanced magnetic properties in BiFeO{sub 3} ceramic prepared by high-pressure synthesis

Journal Article · Mon Aug 27 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2776864· OSTI ID:21016117

Su, W N; Wang, D H; Cao, Q Q; Han, Z D; Yin, J; Zhang, J R; Du, Y W ^[1]

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1. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China and Department of Physics, Nanjing University, Nanjing 210093 (China)

The BiFeO{sub 3} ceramics were prepared by sol-gel method (BFO-1) and high-pressure synthesis (BFO-2). X-ray diffraction showed that these ceramics are almost of single phase. It is difficult to observe a ferroelectric loop of BFO-1 even at an electric field of 6 kV/cm. Compared to BFO-1, the high-pressure synthesized one has higher resistivity, higher density, and better crystallization. Under an applied electric field of 120 kV/cm, the values of remanent polarization and the coercive field are 46 {mu}C/cm{sup 2} and 73 kV/cm, respectively. At room temperature, a magnetic hysteresis loop with enhanced magnetization can be observed in BFO-2.

• OSTI ID: 21016117
• Journal Information: Applied Physics Letters, Vol. 91, Issue 9; Other Information: DOI: 10.1063/1.2776864; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH COMPOUNDS
CERAMICS
COERCIVE FORCE
CRYSTALLIZATION
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
FERROMAGNETIC MATERIALS
HYSTERESIS
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
POLARIZATION
SOL-GEL PROCESS
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION