Abstract
Polycrystalline La2−XGdXNiMnO6 (x = 0.0, 0.5 and 1.0) double perovskites were synthesized by auto combustion sol-gel method. The prepared samples have monoclinic phase with space group P21/n, revealed by Rietveld analysis of x-ray diffraction (XRD) pattern. The analysis of reflectivity spectrum showed well resolved infrared (IR) active phonon modes. We discuss the results in terms of different phonon bands originated as a result of atomic vibrations. Optical energy band gap (Eg) has been estimated from optical conductivity (σ1 (ω)) spectrum and UV-visible absorption spectrum. Temperature dependent resistivity measurements suggest variable range hopping conduction mechanism in these multiferroics.
Published Version
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