Structural, Magnetic and Electric Characteristics of Multiferroic CoFe<sub>2</sub>O<sub>4</sub>/BNEuT Composite Thin Films Produced by Non-aqueous Sol-gel Process

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  • Kikuchi Kazuki
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Kobune Masafumi
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Kikuchi Takeyuki
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Migita Tsubasa
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Haruna Yusuke
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Yae Shinji
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo
  • Fukumuro Naoki
    Department of Chemical Engineering and Materials Science, Graduate School of Engineering, University of Hyogo

Abstract

<p>Ferromagnetic cobalt ferrite (CoFe2O4) thin films for magnetoelectric multiferroic applications were synthesized on (Bi3.25Nd0.65Eu0.10)Ti3O12/Nb:TiO2 substrates at reaction temperatures of 140-190°C using a non-aqueous sol-gel process. The magnetic properties of the films were measured, and the sample synthesized at 180°C was found to exhibit the highest residual magnetization and coercivity of 1.5 emu/g and 134 Oe, respectively. The ferroelectric properties of all samples were similar, with a large remanent polarization of 58-67 μC/cm2 and a coercive field of 421-462 kV/cm, regardless of the reaction temperature. Based on its magnetic and ferroelectric properties, the sample synthesized at 180°C has potential as a practical multiferroic material.</p>

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