Open AccessTemperature dependent transport and dielectric properties of cadmium titanate nanofiber mats
Author(s) -
Zahid Imran,
M. A. Rafiq,
Mushtaq Ahmad,
Kamran Rasool,
Syeda Sitwat Batool,
M. M. Hasan
Publication year - 2013
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4799756
Subject(s) - materials science , nanofiber , crystallite , dielectric , conductivity , electrospinning , composite material , electrical resistivity and conductivity , polymer , optoelectronics , chemistry , electrical engineering , metallurgy , engineering
We investigate electrical and dielectric properties of cadmium titanate (CdTiO3) nanofiber mats prepared by electrospinning. The nanofibers were polycrystalline having diameter ∼50 nm-200 nm, average length ∼100 μm and crystallite size ∼25 nm. Alternating current impedance measurements were carried out from 318 K – 498 K. The frequency of ac signal was varied from 2 – 105 Hz. The complex impedance plots revealed two depressed semicircular arcs indicating the bulk and interface contribution to overall electrical behavior of nanofiber mats. The bulk resistance was found to increase with decrease in temperature exhibiting typical semiconductor like behavior. The modulus analysis shows the non-Debye type conductivity relaxation in nanofiber mats. The ac conductivity spectrum obeyed the Jonscher power law. Analysis of frequency dependent ac conductivity revealed presence of the correlated barrier hopping (CBH) in nanofiber mats over the entire temperature range