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Effect of heat treatment on the structure and properties of chemical solution processed multiferroic BiFeO3 thin films

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Abstract

In this work, we report on the growth and characterization of polycrystalline BiFeO3 (BFO) thin films deposited on indium tin oxide (ITO) coated glass substrates via the chemical solution deposition technique. The as-deposited films were crystallized by heat treatment at various temperatures for 1 h in various atmospheres, i.e. oxygen, air and nitrogen. Grazing angle X-ray diffraction (GIXRD) analysis of the heat treated films revealed that both annealing temperatures as well as the atmosphere, had a pronounced effect on the formation of pure perovskite-type BiFeO3 phase. Ferroelectric measurements showed that the films heat treated in nitrogen showed superior characteristics to those heat treated in air and oxygen with a remanent polarization of 0.52 μC/cm2 and 1.9 μC/cm2 for the films annealed at 600 °C and 650 °C respectively at an applied field of 60 kV/cm. BiFeO3 films annealed in nitrogen also showed maximum dielectric constant (εr∼300), superior leakage resistance and magnetic properties over other films.

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Authors and Affiliations

  1. Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur, 208016, India

    V.R. Singh & A. Garg

  2. Materials Science Programme, Indian Institute of Technology, Kanpur, 208016, India

    A. Dixit & D.C. Agrawal

Authors
  1. V.R. Singh
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  2. A. Dixit
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  3. A. Garg
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  4. D.C. Agrawal
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Correspondence to A. Garg.

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PACS

77.80.-e; 77.84.-S; 75.50.Bb

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Singh, V., Dixit, A., Garg, A. et al. Effect of heat treatment on the structure and properties of chemical solution processed multiferroic BiFeO3 thin films. Appl. Phys. A 90, 197–202 (2008). https://doi.org/10.1007/s00339-007-4257-5

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  • DOI: https://doi.org/10.1007/s00339-007-4257-5

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