8-9th August, 2008 School of Materials Science & Nanotechnology,Jadavpur University
Characterization and Magnetic Properties of
Nanocrystalline Multiferroic BiFeO3
S. Bose1, D. Chakravorty1 and M. Pal2*
1Indian Association for the cultivation of Science, Jadavpur, Kolkata – 700 075, India.
2 Department of Physics, The University of Burdwan, West-Bengal, 713 104, India.
E-mail:phy_mpal@buruniv.ac.in
Abstract
Great interest has been paid to multiferroics, which exhibit simultaneously ferroelectricity and magnetism, due to the potential application for new electronic devices as well as fascinating fundamental physics. Single-phase nanocrystalline BiFeO3 has been synthesized by a simple low temperature hydrothermal route. X-ray diffraction and transmission electron microscopy study have been utilized to characterize the prepared samples. Differential thermal analysis shows an endothermic peak at around 840 C, which is the indication of ferroelectric Curie temperature of the prepared sample. Temperature dependent magnetization and hysteresis loops indicate both ferromagnetic and antiferromagnetic behavior in nanocrystalline BiFeO3. The value of saturation magnetization increases with the decrease of particle size. A detailed comparison of magnetic properties of both bulk and nanocrystalline BiFeO3 will be presented.
Keywords; Hydrothermal route, Nanocrystalline BiFeO3, Magnetic properties.
* Corresponding author
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