Title :
A random-field model for ferroelectric domain dynamics: analysis by stretched exponential functions
Author :
Viehland, D. ; Li, J.F.
Author_Institution :
Dept. of Mater. Sci. & Eng., Virginia Tech, Blacksburg, VA, USA
fDate :
28 May-1 June 2002
Abstract :
Polarization reversal and domain dynamics have been investigated in 0.7Pb(Mg13/Nb23/)O3-0.3PbTiO3 using a method of current transients. Investigations were performed as a function of applied electric field. The kinetics of the transients have been modeled to a stretched exponential type function. We believe that nucleation of polar clusters with a reversed polarization occurs under applied field in the vicinity of randomly quenched defects.
Keywords :
dielectric depolarisation; dielectric polarisation; electric domains; ferroelectric materials; lead compounds; transients; PMN-PbTiO3; Pb(Mg13/Nb23/)O3-PbTiO3; PbMgO3NbO3-PbTiO3; current transients; ferroelectric domain dynamics; polar clusters nucleation; polarization reversal; random-field model; randomly quenched defects; reversed polarization; stretched exponential functions; stretched exponential type function; Crystals; Current measurement; Electrical resistance measurement; Equations; Ferroelectric materials; Kinetic theory; Polarization; Pulse amplifiers; Pulse measurements; Voltage;
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
Print_ISBN :
0-7803-7414-2
DOI :
10.1109/ISAF.2002.1195859
