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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13525
Title: BiFeO3–CoFe2O4–PbTiO3 composites: structural, multiferroic, and optical characteristics
Authors: Adhlakha N.
Yadav, Kamlesh Kumar
Singh R.
Published in: Journal of Materials Science
Abstract: Three-phase magnetoelectric composites (1 − x)(0.7BiFeO3–0.3CoFe2O4)–xPbTiO3 (or equivalently written as (1 − x)(0.7BFO–0.3CFO)–xPT) with x variations 0, 0.30, 0.35, 0.40, 0.45, and 1.0 were synthesized using hybrid processing route. The effects of PT addition on structural, multiferroic, and optical properties have been subsequently investigated. A detailed Rietveld refinement analysis of X-ray diffraction patterns has been performed, which confirms the presence of structural phases of individual constituents in the composites. Field emission scanning electron microscopy images are taken for microstructural analysis and grain size determination. Transmission electron microscopy analysis of 0.3CFO–0.7BFO reveals the average particle size to be lying in the window of 10–15 nm. The temperature-dependent dielectric constant at various frequencies (1, 10, 50, 100, and 500 kHz) has been studied, and the dielectric study reveals the increase of dielectric constant and decrease of average dielectric loss of composites with incorporation of PT content. Room temperature ferromagnetic behavior of composites is confirmed through the observation of magnetization versus magnetic field (M–H) hysteresis loops. The variation of magnetization with temperature indicates the presence of spin glass behavior in composites. Magnetoelectric coupling is evidenced in the composites through the observation of dependence of the dielectric constant on magnetic field, and magnetodielectric response of 2.05 % is observed for 45 mol% addition of PT content. The fractional change of magnetic field-induced dielectric constant can also be expressed as Δɛr ∼ γM2, and the value of γ is found to be ~1.08 × 10−2 (emu/g)−2 for composite with x = 0.40. Fourier transformed infrared spectroscopy of samples is carried out to analyze various bonds formation in the composites. © 2014, Springer Science+Business Media New York.
Citation: Journal of Materials Science (2015), 50(5): 2073-2084
URI: https://doi.org/10.1007/s10853-014-8769-z
http://repository.iitr.ac.in/handle/123456789/13525
Issue Date: 2015
Publisher: Kluwer Academic Publishers
ISSN: 222461
Author Scopus IDs: 20733442400
7005825645
55496975700
Author Affiliations: Adhlakha, N., Smart Material Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Yadav, K.L., Smart Material Research Laboratory, Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Singh, R., Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
Corresponding Author: Yadav, K.L.; Smart Material Research Laboratory, Department of Physics, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [PH]

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