Dielectric dispersion analysis of copolymer L-B thin film

Electronics Engineering Department, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid 21163, Jordan

^a e-mail: shboon@yu.edu.jo

Received: 25 August 2011
Revised: 2 January 2012
Accepted: 6 January 2012
Published online: 30 January 2012

Abstract

The dielectric dispersion of copolymer ferroelectric Langmuir-Blodgett thin film has been subjected to investigation using multiple-arc methodology with the associated relaxation time distribution. The analysis made use of reported data over the frequency range 10 Hz–2 MHz and over the temperature range of 308–398 K. The analysis indicated the presence of two distinct polarization modes corresponding to high- and low-frequency arcs. The modes have different characterizations in terms of the relaxation spread and mean time trends with temperature. The trends of the low-frequency arc with temperature support ferroelectric property for the thin L-B film. Satisfactory agreements have been realized between the experimental data and those derived by multiple-arc approach.