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  Journal of Nanoscience Letters 2013, 3: 10
  Research Article
Effect of template chemical composition on multiferroic properties of Bi0.7Dy0.3FeO3 nanorods
  M. Mandal, S. P. Duttagupta, R. Pinto and V. R. Palkar  
Centre for Excellence in Nanoelectronics, Electrical Engineering,
Indian Institute of Technology Bombay, Mumbai - 400076, India

  Vertically aligned arrays of Si and ZnO nanorods grown on Si substrate are used as a template for the growth of Bi0.7Dy0.3FeO3 (BDFO) nanorods. Pulsed laser deposition technique is used to coat BDFO on the surface of Si and ZnO nanorods. Surprisingly, though the deposited BDFO coating for Si as well as ZnO is phase pure, ferroelectric properties of BDFO/ZnO nanorods are superior as compared to BDFO/Si nanorods. This could be due to 5-8 nm thick non-ferroelectric secondary phase formed at the interface of BDFO and Si nanorod. In contrast interface of BDFO and ZnO is sharp and clean. Besides, BDFO/ZnO nanorods indicate enhancement in the stress mediated ME coupling factor and also in piezoresponse behavior. Piezoelectric nature of the ZnO template is likely to contribute to the advancement in properties.
  Oxides; Nanostructures; Coatings; Pulsed laser deposition  

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