Journal of the Korean Physical Society

, Volume 62, Issue 12, pp 2128–2132 | Cite as

Electron-spin-resonance spectra and ferroelectricity of BaTi1−x FexO3

  • D. Ginting
  • S. C. Yu
  • T. L. Phan
  • N. V. Dang
  • T. D. Thanh
  • V. D. Lam
Article
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Abstract

We have studied electron-spin-resonance (ESR) spectra and the ferroelectricity of polycrystalline BaTi1−x Fe x O3 ceramics. The features of the ESR spectra recorded at room temperature reveal that the samples with x = 0.02 − 0.06 are paramagnetic while the others are ferromagnetic. These results are in good agreement with those reported previously for magnetization measurements. In our case, the ESR spectra are mainly related to dipole-dipole interactions taking place between Fe3+ and Fe4+ ions, which are co-present in the samples. Electrical investigations of the polarization reveal room-temperature P - E hysteresis loops for all the samples. Both the remnant polarization (P r ) and the ferroelectric P - E loop decrease with increasing Fe content (x) in BaTi1−x Fe x O3, indicating a decrease in the ferroelectricity. This is ascribed to an incorporation of Fe dopants into the tetragonal BaTiO3 lattice and to a structural phase separation.

Keywords

Fe-doped BaTiO3 Magnetic resonance Ferroelectricity 
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Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  • D. Ginting
    • 1
  • S. C. Yu
    • 1
  • T. L. Phan
    • 1
  • N. V. Dang
    • 2
  • T. D. Thanh
    • 2
  • V. D. Lam
    • 2
  1. 1.Department of PhysicsChungbuk National UniversityCheongjuKorea
  2. 2.Institute of Materials ScienceVietnamese Academy of Science and TechnologyCau Giay, HanoiVietnam

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