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Structural changes and magnetism in Bi1−xBa x FeO3 (x = 0, 0.1, 0.2, 0.3) nanopowders

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Abstract

Bi1−xBa x FeO3 (x = 0, 0.1, 0.2 and 0.3) ceramic nanopowders were prepared by the ethylene glycol-based sol–gel method followed by heat treatment at 800 °C for 1 h. The effect of Ba2+ ions substitution on the structural and magnetic properties of the BiFeO3 (BFO) has been investigated. X-ray diffraction along with Rietveld refinement of Ba-substituted samples showed the presence of both rhombohedral (R3c) and pseudocubic (Pm3m) phases. Microstructural analysis confirmed the formation of homogeneous and nearly cubic nanoparticles. Result shows a reasonable enhancement in saturation magnetization of the substituted samples. Bi0.9Ba0.1FeO3 having 30% R3c and 70% Pm3m phases, show maximum saturation magnetization, i.e., 0.32 emu/g at room temperature. The magnetic properties of synthesized ceramics have been discussed in terms of FeO6 octahedra tilting with respect to body diagonal <111> of the pseudocubic system. By combining magnetic measurements with thermal analysis, it is shown that the substitution of Ba for Bi site causes an enhancement in magnetic transition temperature (TN).

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Authors and Affiliations

  1. Department of Physics, Materials Science Lab, Chaudhary Devi Lal University, Sirsa, India

    Anju Jindal & Praveen Aghamkar

  2. Department of Applied Physics, Guru Jambheshwar University of Science & Technology, Hisar, India

    Ashish Agarwal

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  1. Anju Jindal
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Correspondence to Praveen Aghamkar.

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Jindal, A., Agarwal, A. & Aghamkar, P. Structural changes and magnetism in Bi1−xBa x FeO3 (x = 0, 0.1, 0.2, 0.3) nanopowders. Appl. Phys. A 124, 323 (2018). https://doi.org/10.1007/s00339-018-1732-0

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