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Inducing multiferroic behaviour in the diamagnetic Y2O3 system

  • Venugopalan Anbarasu
  • Appasamy Manigandan
  • Thangavelu Karthik
  • Kandasamy Sivakumar
Article

Abstract

The synthesis and characterization of Y2−xFexO3 (where x = 0–0.3) compounds has been carried out for their importance in the field of multiferroic materials. The powder X-ray diffraction reveal that the compounds Y1.95Fe0.05O3, Y1.9Fe0.1O3, Y1.85Fe0.15O3 and Y1.8Fe0.2O3 crystallize in tetragonal structure whereas Y1.75Fe0.25O3 and Y1.7Fe0.3O3 compounds crystallize in orthorhombic structure. The change in crystal system with respect to the concentration of Fe may be attributed to the variation in occupancy position of Fe3+ into the Y3+ site of Y2O3 system. Variation in crystal structure, surface morphology and composition was studied by micro-Raman analysis, SEM and EDX analysis. The shift in intense Raman signals from 426 to 385 cm−1 confirms the change in the crystal structure of the prepared compounds. Further it is also identified that the Eg mode of vibration is the dominant in the Fe substituted compounds. The substitution of Fe in the Y2O3 system leads to the increase in the intensity of resonance band, which indicates a large polarisability variation in the Y2−xFexO3 compounds. Diffused reflectance studies show a red shift in energy gap values while increasing the concentration of Fe. The room temperature magnetization and electron paramagnetic resonance studies reveal that the incorporation of Fe in the Y2O3 system leads to magnetic phase change from diamagnetic to ferromagnetic. The electric polarization studies imply that the substitution of lower ionic radii element Fe3+ in the Y3+ site leads to distortion in the lattice and show the way to spontaneous dipole moment and it was found that the Y1.8Fe0.2O3 compound exhibits the possibility of multiferroic behaviour. Therefore this paper explores the possibility of inducing ferromagnetic and ferroelectric behaviour in the Fe substituted yttrium oxide system.

Keywords

Y2O3 Electron Paramagnetic Resonance Spectrum BiFeO3 Yttrium Oxide Prepared Compound 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Venugopalan Anbarasu
    • 1
  • Appasamy Manigandan
    • 1
  • Thangavelu Karthik
    • 2
  • Kandasamy Sivakumar
    • 1
  1. 1.Department of PhysicsAnna UniversityChennaiIndia
  2. 2.Department of Materials Science and EngineeringIndian Institute of Technology HyderabadYeddumailaramIndia

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