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Enhancement of Magnetic and Dielectric Properties in Chemically Modified Multiferroic (0.90)BiFe1−x Cr x O3–(0.10)BaTiO3 Nanocomposite

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Abstract

Multiferroic BiFeO3 and Cr-doped (0.90)BiFe1−x Cr x O3–(0.10)BaTiO3 (x=0.00, 0.03, and 0.05) nanocomposites were prepared by sol–gel method. Optimum calcination and sintering strategies for obtaining pure perovskite phase have been determined. X-ray diffraction and transmission electron microscope (TEM) were used for the structural and particle size analysis, whereas LCR and SQUID magnetometer was used for dielectric and magnetic measurements. TEM measurements show that the average particle sizes of all the samples were ∼19 nm. The dielectric constant was found to be increased twofold in low frequency region with the Cr-doping for x=0.05 in (0.90)BiFe1−x Cr x O3–(0.10)BaTiO3. The hysteresis curve (M–H) exhibits ferromagnetic nature for all the samples (x=0.0, 0.03, and 0.05) and the spontaneous magnetization at room temperature was found to be 0.63 emu/gm in pure BiFeO3, which increased to 0.99 emu/gm for x=0.05. Zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves show large discrepancy suggesting spin glass behavior.

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Acknowledgements

MS is grateful to the Sharda University of India for providing financial support and leave for carrying out this work at Motilal Nehru National Institute of Technology in Allahabad. NK is thankful to Department of Science and Technology, Government of India, for the funding (SR/FTP/PS-04/2008).

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Authors and Affiliations

  1. Department of Physics, Motilal Nehru National Institute of Technology, Allahabad, India

    Mohit Sahni, Sushant Singh, Richa Bhargava & Naresh Kumar

  2. Institute Instrumentation Centre, IIT Roorkee, Roorkee, India

    Amit Kumar Chawla & Ramesh Chandra

  3. Department of Physics, Sharda University, Greater Noida, India

    Mohit Sahni

  4. Department of Physics, BITS, Pilani, India

    Anshuman Dalvi & Neha Gupta

  5. Dharmsinh Desai University, Gujarat, India

    Sanjeev Kumar

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  1. Mohit Sahni
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  2. Sushant Singh
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Correspondence to Mohit Sahni.

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Sahni, M., Singh, S., Bhargava, R. et al. Enhancement of Magnetic and Dielectric Properties in Chemically Modified Multiferroic (0.90)BiFe1−x Cr x O3–(0.10)BaTiO3 Nanocomposite. J Supercond Nov Magn 26, 397–402 (2013). https://doi.org/10.1007/s10948-012-1736-5

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  • DOI: https://doi.org/10.1007/s10948-012-1736-5

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