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Investigation of structural and electrical properties of Gd ions modified BaZrTiO ceramic

Applied Physics A: Materials Science and Processing, ISSN: 1432-0630, Vol: 124, Issue: 11
2018
  • 14
    Citations
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  • 15
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    14
    • Citation Indexes
      14
  • Captures
    15

Article Description

Gadolinium (Gd) doped BaZrTiO ceramic samples with general formula BaGdZrTiO were prepared by the solid state reaction method. The effect of Gd on the structural and dielectric behaviours of BaZrTiO have been studied in detail. X-ray diffraction studies revealed that site substitution by Gd ions had a great impact on the site occupancy of the BaZrTiO pervoskite. The lattice parameters increased up to x = 0.03 followed by a decrease at higher concentration showing both donor and acceptor behaviours of Gd in BaZrTiO matrix. Structural changes were studied by Raman spectroscopy also, which showed the non-linear shifting of the modes with increasing doping concentration. The scanning electron microscopy images showed a drastic modification in grain size with increasing Gd concentration. The effect of substitution of Gd ions in BaZrTiO was investigated by means of dielectric studies and the dielectric behaviour was explained using self-compensation model. The diffusivity in the samples was studied by modified Curie–Weiss law.

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