TITLE:
Dielectric Properties of Er3+ Doped ZnO Nanocrystals
AUTHORS:
N. K. Divya, P. U. Aparna, P. P. Pradyumnan
KEYWORDS:
Solid State Reaction, XRD, Crystallite Size, Bond Length, Dielectric Constant, AC Conductivity
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.5 No.8,
August
5,
2015
ABSTRACT: Erbium
doped ZnO nanocrystals were synthesized through solid state reaction route. A
detailed structural study was carried out by using X-ray diffraction (XRD)
data. This work investigates the changes occurred to the hexagonal wurtzite
crystal lattice of ZnO due to the incorporation of Er3+ based on
crystalline size. The chemical composition of the samples was confirmed using
Energy Dispersive Spectra (EDS) data analysis. Decrease in average crystallite
size with increase in rare earth concentration was observed in XRD. The
frequency dependence of dielectric constant (εr), dielectric loss (tanδ) and AC conductivity of pure and rare earth doped
ZnO were calculated and well explained with Maxwell-Weigner model.