Effect of cobalt doping on structural and dielectric properties of nanocrystalline LaCrO3

• DOI: 10.1063/1.5032579
• Publication Date: 2018-05-08T17:01:21Z
• Authors: Naima Zarrin; Shahid Husain
• Keywords: Nanocrystalline material; Orthorhombic crystal system; Rietveld Refinement; Lattice constant; Lanthanum; Scherrer equation

Pure and Co doped Lanthanum chromite (LaCrO3) nanoparticles, LaCr1-xCoxO3 (0≤x≤0.3), have been synthesized through sol-gel process their structural, morphological dielectric properties studied. X ray diffraction patterns reveal that the samples are in single phase having orthorhombic structure with Pnma space group. Structural parameters refined by Rietveld refinement using Fullprof software. Lattice unit cell volume found to decrease increase doping. Crystallite size is calculated Scherrer equation also concentration. Surface morphology examined SEM-EDX analysis, which confirms formation of regular homogeneous without any impurities. The value constant (ε′) decreases frequency while it enhances log (ε′×f) versus (f) graphs plotted verify universal response (UDR) model. All follow UDR model low range.