Evolution of domain structure and ferroelectric polarization in praseodymium doped BiFeO3 ceramics

Cheng Sao Chen, Pin Yi Chen, Wei Sea Chang, Carvyn Blaise, Lin Hsieh Yi, R. R. Chien, V. Hugo Schmidt, Yi Shin Jou, Chi Shun Tu

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    1 Citation (Scopus)

    Abstract

    Nanoscale domain structure, electric-field-induced polarization switching and electromagnetic strain in lead-free perovskite bismuth ferrite are substantial parameters for nonvolatile magnetoelectric applications. This work highlights nano-to-micro domain morphology, polarization switching and electromechanical mechanisms in (Bi1-xPrx)FeO3 ceramics in the vicinity of the morphotropic phase boundary (MPB). A coexistence of ferroelectric rhombohedral R3c and antiferroelectric orthorhombic Pbam symmetries was identified in conjunction with antiphase domain boundaries and polar nano-regions in the interiors of grains as the system crosses the MPB. Out-of-plane piezoresponse force microscopy indicates decreased ferroelectric polarization and capability of polarization switching as the system approaches the MPB. Frequency- and temperature-dependent dielectric permittivity indicates a relaxor characteristic in all compositions. The O 2p-Fe 3d and O 2p-Bi 6s(p) orbital hybridizations play key roles for evolution of structural distortion, polarization and electromechanical.

    Original languageEnglish
    Article number111054
    Number of pages11
    JournalMaterials Research Bulletin
    Volume133
    DOIs
    Publication statusPublished - Jan 2021

    Keywords

    • A. Ceramics
    • A. Structural materials
    • C. Atomic force microscopy
    • C. Transmission electron microscopy
    • D. Multiferroics

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