Abstract
Zr substituted BiFeO3 (BiFe1−xZrxO3 with x = 0.03, 0.07, 0.10 and 0.15) nanoparticles were synthesized by sol–gel method. Powder X-ray diffraction studies showed rhombohedral crystal structure for x = 0.03–0.10 samples. The substitution induced structural transformation from rhombohedral to triclinic phase has been observed for x = 0.15. Raman analysis confirmed this structural transformation as also the distortion induced spin phonon coupling. Enhanced magnetic behaviour with saturation magnetization of 7.62 emu/g has been observed in x = 0.07 sample. The dielectric measurements indicated the strong magneto-electric coupling in the range of Neel temperature. The impedance study over a wider frequency and temperature range suggests decrease in conductivity in the samples with increasing Zr concentration. UV–Vis diffuse reflectance spectra shows the strong absorption of visible light suggesting the band gap values from 2.22 to 2.15 eV corresponding to x = 0.03–0.15 compositions.
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Acknowledgments
The authors would like to acknowledge financial support from the Department of Science and Technology (DST), Govt. of India through Grant No. SR/FTP/PS-91/2009.
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Arora, M., Chauhan, S., Sati, P.C. et al. Spin-phonon coupling and improved multiferroic properties of Zr substituted BiFeO3 nanoparticles. J Mater Sci: Mater Electron 25, 4286–4299 (2014). https://doi.org/10.1007/s10854-014-2163-0
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DOI: https://doi.org/10.1007/s10854-014-2163-0