Effect of 3d transition metal doping (Co, Ni and Cu) on structural, optical, morphological and dielectric properties of sol-gel assisted auto-combusted Mg_(0.95)Mn_(0.05)O nanoparticles

摘要

AbstractWe hereby report the synthesis of Mg0.95Mn0.05O nanostructures using auto-combustion method. Effect of incorporation of different transition metal dopants (cobalt, nickel and copper) on structural, optical, morphological and dielectric properties of pristine Mg0.95Mn0.05O is investigated. X-ray diffraction plots confirm the cubic crystal structure of these samples. The crystallite size is found to be 78.2, 67.02, 78.11 and 64 nm for pure, Co, Cu and Ni doped MgMnO, respectively. Raman analysis clearly envisages the purity of the presently synthesized samples. Optical transmission spectrum shows that samples are highly transparent in the UV–Visible region. In addition, the FTIR results established the presence of magnesium oxide in all samples. Dielectric characterization depicts a reasonable decrease in the dielectric constantε′ as function of improving frequency, which in turn confirms its dispersive nature.