SYNTHESIS AND CHARACTERIZATION OF REBaBiO4 (WHERE RE = Pr and Gd) SYSTEM

Abstract

The new bismuthates in the system REBaBiO 4 (where RE = Pr and Gd ) have been prepared by solid state reaction technique. From the structural characterizations through powder XRD patterns shows the single phase of the title compounds, which crystallizes in orthorhombic structure. The lattice parameters observed for the system BaPrBiO 4 is a = 6.512(3) Å, b = 6.589(5) Å, c = 8.732(4) Å and BaGdBiO 4 is a = 6.374(4) Å, b = 6.515(4) Å, c = 8.624(4) Å. The magnetization property of both the samples exhibit paramagnetic nature at both low and room temperature conditions. The energy gap value of the compound PrBaBiO 4 was calculated as 3.6046 eV, which shows the insulating nature of the material, and GdBaBiO 4 compound has got the range of 1.6356–2.1767 eV, which shows the semi-conducting nature at room temperature condition.