Dielectric properties of Mn doped ZnO nanostructures

S. Ajin Sundar, N. Joseph John

Zinc oxide and Mn doped zinc oxide nanoparticles were synthesized by wet chemical technique using zinc acetate dehydrate as a precursor. Highly stable pure and 0.2, 0.4, 0.6, 0.8, 1.0 and 5.0 weight percentage Mn doped ZnO nanoparticles have been prepared at room temperature. The detailed structural properties were examined using X-ray diffraction pattern (XRD) which revealed that the synthesized nano particles are well crystalline and possessing wurtzite hexagonal phase. The dielectric studies were carried out. The present study indicates that the polarization mechanism in the nano particles considered is mainly contributed by space charge polarization. It can be understood that the space charge contribution plays an important role in the charge transport and polarizability in all the  systems considered in the present study. The dielectric constant, dielectric loss, AC conductivity and DC conductivity increases with increase in temperature.