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Crystallite size effect on voltage tunable giant dielectric permittivity of nanocrystalline CuO
Date Issued
01-01-2013
Author(s)
Prakash, T.
Murty, B. S.
Kaskhedikar, A. R.
Peshwe, P. D.
Abstract
The effect of crystallite size and applied DC bias voltage on dielectric permittivity of CuO was studied using impedance spectroscopy. The measurements were performed at room temperature in a wide frequency range of 1 Hz to 1 MHz under applied DC bias voltages from 0 to 3 V in the periodic increment of 0. 2 V. The observed applied DC bias voltage effect on giant dielectric constant (e{open}′ = 104) were analyzed with 'grain boundary double Schottky potential barrier height model'. The percentage of tunability (T %) at the frequency 100 Hz is found to be 45. 5% for the case of nanocrystalline CuO in contrast to 0% tunability in bulk CuO. © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
Volume
9