Preparation, Structural and Dielectric Behaviors of CoxMn1-xMn2O4 (0 ≤ x ≤ 1) Nanoparticles

Abstract

Cobalt-manganese oxide nanoparticles become remarkable metal oxides due to their physical characters, for example, their electrical properties. In this paper, we report the synthesis of Co x Mn1-xMn2O4 (0 ≤ x ≤ 1) nanoparticles via a precipitation method. The structural and dielectric properties were investigated by means of X-ray diffractometer (XRD) and LCR-meter. From the data analysis, it was found that the Co x Mn1-xMn2O4 particles structured spinel cubic with the particle size ranging from 22.7 to 28.6 nm. Increasing Co2+ ions led to declining lattice and crystal volume of the Co x Mn1-xMn2O4 nanoparticles. Such phenomenon was originated from the substitution process of Co2+ ions that change the metal construction both at the octahedral and tetrahedral sites. Furthermore, the Co2+ ion substitution resulted in an increase in the dielectric properties of the Co x Mn1-xMn2O4 nanoparticles regarding with dipole moment. Interestingly, the increase was also influenced by reducing the particle size and crystal volume of the Co x Mn1-xMn2O4 nanoparticles.