Get access

Ferroelectric-to-Relaxor Crossover in (1-x)BaTiO3-xBiYbO3 (0 ≤ x ≤ 0.08) Ceramics

Authors

  • Tamsin Strathdee,

    1. Christian Doppler Laboratory for Advanced Ferroic Oxides, School of Chemistry, The University of Birmingham, Birmingham, U.K.
    Search for more papers by this author
  • Luke Luisman,

    1. Christian Doppler Laboratory for Advanced Ferroic Oxides, School of Chemistry, The University of Birmingham, Birmingham, U.K.
    Search for more papers by this author
  • Antonio Feteira,

    Corresponding author
    • Christian Doppler Laboratory for Advanced Ferroic Oxides, School of Chemistry, The University of Birmingham, Birmingham, U.K.
    Search for more papers by this author
  • Klaus Reichmann

    1. Christian Doppler Laboratory for Advanced Ferroic Oxides, Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
    Search for more papers by this author

Author to whom correspondence should be addressed. e-mail: a.feteira@bham.ac.uk

Abstract

Dense (1-x)BaTiO3-xBiYbO3 (BBTYb) ceramics were fabricated by the solid state reaction method. According to X-ray diffraction data, the average crystal symmetry of x ≤ 0.04 ceramics is described by the non-centro symmetric tetragonal P4mm space group, whereas the average crystal symmetry of x ≥ 0.06 ceramics is better described by the centrosymmetric cubic Pmmath formulam space group. Raman spectroscopy supports a change in the average crystal symmetry at x ≥ 0.06, but also reveals differences in the local crystal structure for x ≤ 0.04. In this compositional range, BBTYb ceramics undergo a so-called ferroelectric-to-relaxor crossover, which is a manifestation of the continuous modification of local structure. Weak-relaxor behavior was observed in x ≥ 0.06 ceramics, for which the local crystal symmetry departs from cubic, as indicated by the presence of Raman spectra.

Ancillary