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Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping

Bhushan, Bhavya and Wang, Zhenxing and Tol, Johan and Dalal, Naresh S and Basumallick, Amitava and Vasanthacharya, Nagasampagi Y and Kumar, Sanjay and Das, Dipankar (2012) Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping. In: JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 95 (6). pp. 1985-1992.

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Official URL: http://dx.doi.org/10.1111/j.1551-2916.2012.05132.x...

Abstract

The Ce-doped BiFeO3 (BFO) nanoparticles (NPs) were synthesized using a facile solgel route with varying Ce concentrations in the range of 15 mol%. Ferroelectric transition temperature was found to shift from 723 degrees C +/- 5 degrees C for pristine BFO NPs to 534 degrees C +/- 3 degrees C for 5 mol% Ce-doped BFO NPs. UVVis absorption spectra of BFO NPs showed a significant blue shift of similar to 100 nm on Ce doping. The Fourier transformed infrared (FTIR) spectrum centered similar to 550 cm(-1) becomes considerably broadened on Ce doping which is due to additional closely spaced vibrational peaks as revealed by the second derivative FTIR analysis. High-frequency EPR measurements indicated that clustering occurs at high dopant levels, and that Fe is present as Fe(3+)corroborating Mossbauer measurements. The values of saturation and remanent magnetization for 3% Ce-doped BFO NPs are 3.03 and 0.49 emu/g, respectively, which are quite significant at room temperature, making it more suitable for technological applications.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to John Wiley & Sons, Inc.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 05 Jul 2012 07:36
Last Modified: 05 Jul 2012 07:36
URI: http://eprints.iisc.ernet.in/id/eprint/44764

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