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      Investigating the local structure of B-site cations in (1-x) BaTiO3exBiScO3 and (1-x)PbTiO3exBiScO3 using X-ray absorption spectroscopy

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      Date
      2018
      Author
      Blanchard, Peter
      Grosvenor, Andrew
      Publisher
      Elsevier
      Type
      Article
      Metadata
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      Abstract
      The structural properties of (1-x)BaTiO3exBiScO3 and (1-x)PbTiO3exBiScO3 were investigated using powder X-ray diffraction and X-ray absorption spectroscopy. Diffraction measurements confirmed that substituting small amounts of BiScO3 into BaTiO3 initially stabilizes a cubic phase at x 1⁄4 0.2 before im- purity phases begin to form at x 1⁄4 0.5. BiScO3 substitution also resulted in noticeable changes in the local coordination environment of Ti4þ. X-ray absorption near-edge spectroscopy (XANES) analysis showed that replacing Ti4þ with Sc3þ results in an increase in the off-centre displacement of Ti4þ cations. Sur- prisingly, BiScO3 substitution has no effect on the displacement of the Ti4þ cation in the (1-x)PbTiO3 exBiScO3 solid solution.
      Citation
      Solid State Sciences 79 (2018) 6-14
      URI
      http://hdl.handle.net/10388/8561
      Subject
      Perovskites
      Ferroelectrics
      Scandium
      XANES
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      • Chemistry
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