TY - JOUR
AU - C.S Ganpule
AU - A.L Roytburd
AU - V Nagarajan
AU - B.K Hill
AU - S.B Ogale
AU - E.D Williams
AU - Ramamoorthy Ramesh
AU - J.F Scott
AB - The time-dependent relaxation of remanant polarization in epitaxial lead zirconate titanate (formula presented) ferroelectric thin films, containing a uniform two-dimensional grid of 90° domains (c axis in the plane of the film), is examined using voltage-modulated scanning force microscopy. 90° domain walls preferentially nucleate 180° reverse domains during relaxation, which grow and coalesce as a function of relaxation time. Relaxation is seen to saturate at different levels depending on the write voltage. Late (saturation) stages of relaxation are accompanied by pinning and faceting of the domain walls (drastically reducing the wall mobility), which is direct evidence of the role of defect sites and crystallographic features on polarization relaxation. The kinetics of relaxation is modeled through the nucleation and growth Johnson-Mehl-Avrami-Kolmogorov theory with a decreasing driving force. © 2001 The American Physical Society.
BT - Physical Review B - Condensed Matter and Materials Physics
DO - 10.1103/PhysRevB.65.014101
LA - eng
M1 - 1
N1 - cited By 6
N2 - The time-dependent relaxation of remanant polarization in epitaxial lead zirconate titanate (formula presented) ferroelectric thin films, containing a uniform two-dimensional grid of 90° domains (c axis in the plane of the film), is examined using voltage-modulated scanning force microscopy. 90° domain walls preferentially nucleate 180° reverse domains during relaxation, which grow and coalesce as a function of relaxation time. Relaxation is seen to saturate at different levels depending on the write voltage. Late (saturation) stages of relaxation are accompanied by pinning and faceting of the domain walls (drastically reducing the wall mobility), which is direct evidence of the role of defect sites and crystallographic features on polarization relaxation. The kinetics of relaxation is modeled through the nucleation and growth Johnson-Mehl-Avrami-Kolmogorov theory with a decreasing driving force. © 2001 The American Physical Society.
PY - 2002
SP - 1
EP - 7
T2 - Physical Review B - Condensed Matter and Materials Physics
TI - Polarization relaxation kinetics and 180° domain wall dynamics in ferroelectric thin films
VL - 65
SN - 10980121
ER -