# Ferroelectric‐to‐Relaxor Crossover in (1‐

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Dense (1‐x)BaTiO3xBiYbO3 (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 Pm$\overline{\mathbf{3}}$m 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.
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Document Type: Research Article

Publication date: August 1, 2011

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