SYNTHESIS AND CHARACTERIZATION OF Mn SUBSTITUTED ZnO NANOPARTICLES

Abstract

The aim of the work is to synthesize Mn substituted ZnO nanoparticles by co-precipitation method with chemical formula Zn 1-x Mn x O , where x = 0.00, 0.05, 0.10 and 0.15 and to characterize its structural, morphological and magnetic properties. X-ray diffraction studies confirm the presence of wurtzite (hexagonal) crystal structure for doped samples similar to un doped ZnO , indicating that doped Mn replacing Zn . Lattice parameters and unit cell volume were found to increase with increasing Mn concentration, indicating the homogeneous substitution of Mn2+ for Zn2+ . TEM analysis shows the average diameter of the nanoparticles in the range of 20–50 nm. Room temperature magnetic measurements indicate the existence of ferromagnetism in x = 0.00 and 0.05 nanoparticles and co-existence of ferro, para magnetism in x = 0.10 and 0.15 nanoparticles.