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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13801
Title: Enhanced magnetodielectric effect and optical property of lead-free multiferroic (1 - X)(Bi0.5Na0.5)TiO3/xCoFe 2O4 composites
Authors: Rani J.
Yadav, Kamlesh Kumar
Prakash S.
Published in: Materials Chemistry and Physics
Abstract: (1 - x)(Bi0.5Na0.5)TiO3/xCoFe 2O4 composites with x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5 were synthesized by solid state reaction method. Presence of distinct ferroelectric (Bi0.5Na0.5)TiO3 and ferrite CoFe 2O4 phases in the prepared composites have been confirmed by the X-ray diffraction analysis and field emission scanning electron micrographs. The variation of dielectric constant with temperature for these prepared composites show an anomaly near antiferroelectric to paraelectric phase transition temperature (∼345 °C) of pure (Bi0.5Na 0.5)TiO3 ceramics. The dielectric constant of the composites at low frequency range decreases with increase in CoFe 2O4 content up to x = 0.3 but increases for x = 0.4 and x = 0.5. The value of remnant magnetization for 10 and 50% CoFe2O 4 are 2 and 14 emu g-1 respectively. The maximum value of magnetocapacitance was found to be ∼4.37% for 50% CoFe2O 4 content. Increase in CoFe2O4 content in composites shifts the optical band gap of (Bi0.5Na 0.5)TiO3 towards lower energy side. © 2014 Elsevier B.V. All rights reserved.
Citation: Materials Chemistry and Physics (2014), 147(3): 1183-1190
URI: https://doi.org/10.1016/j.matchemphys.2014.07.002
http://repository.iitr.ac.in/handle/123456789/13801
Issue Date: 2014
Publisher: Elsevier Ltd
Keywords: Composite materials
Dielectric properties
Magnetic properties
Microstructure
ISSN: 2540584
Author Scopus IDs: 54387571600
7005825645
36830433000
Author Affiliations: Rani, J., Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
Yadav, K.L., Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
Prakash, S., Metallurgical and Materials Engineering Department, Indian Institute of Technology Roorkee, Roorkee 247667, India
Funding Details: Authors would like to acknowledge the financial help from Council of Scientific and Industrial Research , New Delhi, India under the research grant no. 03(1272)/13/EMR-II dated 12.04.2013.
Corresponding Author: Yadav, K.L.; Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India; email: klyadav35@yahoo.com
Appears in Collections:Journal Publications [PH]

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