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Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO 3 by Ce Doping
Author(s) -
Bhushan Bhavya,
Wang Zhenxing,
Tol Johan,
S. Dalal Naresh,
Basumallick Amitava,
Vasanthacharya Nagasampagi Y.,
Kumar Sanjay,
Das Dipankar
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05132.x
Subject(s) - nanocrystalline material , doping , dopant , fourier transform infrared spectroscopy , materials science , analytical chemistry (journal) , electron paramagnetic resonance , nanoparticle , remanence , nuclear magnetic resonance , magnetization , nanotechnology , chemistry , chemical engineering , magnetic field , optoelectronics , chromatography , physics , quantum mechanics , engineering
The Ce ‐doped BiFeO 3 ( BFO ) nanoparticles ( NPs ) were synthesized using a facile sol–gel route with varying Ce concentrations in the range of 1–5 mol%. Ferroelectric transition temperature was found to shift from 723°C ± 5°C for pristine BFO NPs to 534°C ± 3°C for 5 mol% Ce ‐doped BFO NPs . UV – V is absorption spectra of BFO NPs showed a significant blue shift of ~100 nm on Ce doping. The F ourier transformed infrared ( FTIR ) spectrum centered ~ 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 Mössbauer 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.