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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13638
Title: Dielectric and magnetic properties of xCoFe2O4-(1 - X)[0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3] composites
Authors: Rani J.
Yadav, Kamlesh Kumar
Prakash S.
Published in: Materials Research Bulletin
Abstract: xCoFe2O4-(1 - x)(0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3) composites with x = 0.1, 0.2, 0.3 and 0.4 have been synthesized by solid state reaction method. X-ray diffraction analysis and field emission secondary electron microscopy have been used for structural and morphological analysis, respectively. The spinel CoFe2O4and perovskite 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3phase could be identified in the composites. Two anomalies in dielectric constant have been identified: first one is close to ferroelectric to paraelectric phase transition of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3ceramic and the other lies near the magnetic transition temperature of CoFe2O4. There is an increase in magnetocapacitance and saturation magnetization of the composites at room temperature with increase in CoFe2O4content. The magnetoelectric coupling coefficient (γ) was approximated by Δε ∼ γM2relation. The optical band gap energy of the composites decreases with increase in CoFe2O4content. © 2014 Published by Elsevier Ltd.
Citation: Materials Research Bulletin (2014), 60(): 367-375
URI: https://doi.org/10.1016/j.materresbull.2014.09.013
http://repository.iitr.ac.in/handle/123456789/13638
Issue Date: 2014
Publisher: Elsevier Ltd
Keywords: A. Composites
B. Magnetic properties
C. X-ray diffraction
D. Dielectric properties
ISSN: 255408
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., Department of Metallurgical and Materials Engineering, 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 RoorkeeIndia
Appears in Collections:Journal Publications [PH]

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