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Improved dielectric and magnetic properties of multiferroic BiFeO3–NiFe2O4 nanocomposite thin films

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Abstract

Multiferroic (1−x)BiFeO3(BFO)–xNiFe2O4(NFO) (x = 0, 0.1, 0.2, 0.3) nanocomposite thin films were prepared by sol–gel technique and their structural, electrical and magnetic properties were studied. X-ray diffraction and transmission electron microscopy examinations confirmed that NFO nanoparticles were well distributed in BFO matrix. The magnetic and dielectric properties were significantly improved by incorporation of NFO nanoparticle in matrix of BFO. The saturation magnetization (M s ) and remnant magnetization (M r ) increased as high as ~34 and ~7 emu/cm3 respectively for x = 0.1. The dielectric constant of the films increased from 160 (for x = 0) to 280 (for x = 0.3). However, the values of ferroelectric polarization were decreased with increasing x. Importantly, the sample with (x = 0.1), the best sample in our study demonstrates improved ferroelectric as well as magnetic properties and thus provides a great opportunities for many passive electronic devices for future potential applications.

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Acknowledgments

This work was supported in part by University grant commission (UGC), India, under Grant 40/446/2011 (SR). The authors also would like to acknowledge SQUID, a National facility at IIT Delhi (funded by DST, India) for magnetic measurements.

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Authors and Affiliations

  1. School of Physics and Materials Science, Thapar University, Patiala, 147004, Punjab, India

    Mintu Tyagi & Puneet Sharma

  2. Magnetics and Advanced Ceramics Laboratory, Department of Physics, Indian Institute of Technology, Delhi, 110016, India

    Ratnamala Chatterjee

Authors
  1. Mintu Tyagi
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  2. Ratnamala Chatterjee
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  3. Puneet Sharma
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Correspondence to Puneet Sharma.

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Tyagi, M., Chatterjee, R. & Sharma, P. Improved dielectric and magnetic properties of multiferroic BiFeO3–NiFe2O4 nanocomposite thin films. J Sol-Gel Sci Technol 74, 692–697 (2015). https://doi.org/10.1007/s10971-015-3650-3

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  • DOI: https://doi.org/10.1007/s10971-015-3650-3

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