Fe3+ defect dipole centers in ferroelectric PbTiO3 studied using electron paramagnetic resonance

D. J. Keeble, M. Loyo-Menoyo, Z. I. Y. Booq, R. R. Garipov, V. V. Eremkin, V. Smotrakov

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    Abstract

    Three Fe3+ centers with tetragonal symmetry and with the defect axis parallel to the polarization direction were detected in ferroelectric PbTiO3 crystals using electron paramagnetic resonance. All exhibit large zero-field splittings (ZFS). Two are assigned to Fe3+-oxygen vacancy dipole defect complexes, and the third to the isolated Fe3+ with distant charge compensation. The Fe3+-V-O defect with the largest ZFS converts to the second stable center on annealing; comparison of the cubic ZFS terms show the in-plane oxygen ligands relax outwards in stable center.

    Original languageEnglish
    Article number014101
    Pages (from-to)-
    Number of pages7
    JournalPhysical Review B: Condensed Matter and Materials Physics
    Volume80
    Issue number1
    DOIs
    Publication statusPublished - 2009

    Keywords

    • annealing
    • charge compensation
    • crystal symmetry
    • dielectric polarisation
    • ferroelectric materials
    • hyperfine structure
    • lead compounds
    • paramagnetic resonance
    • vacancies (crystal)
    • S-STATE
    • ALIGNMENT
    • CRYSTALS
    • TITANATE
    • FATIGUE
    • STRAIN
    • OXIDES
    • EPR

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