TY - JOUR
KW - Electric potential
KW - Film
KW - Kinetics
KW - Crystallography
KW - Polarization
KW - Unclassified drug
KW - Article
KW - Chemical structure
KW - Molecular model
KW - Molecular dynamics
KW - Titanium derivative
KW - Scanning force microscopy (SFM)
KW - Lead zirconate titanate (PZT)
KW - Conformational transition
KW - Force
KW - Theory
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 [Pb(Zr0.2Ti0.8)O3,PZT] 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.
BT - Physical Review B - Condensed Matter and Materials Physics
LA - eng
M1 - 1
N1 - cited By 161
N2 - The time-dependent relaxation of remanant polarization in epitaxial lead zirconate titanate [Pb(Zr0.2Ti0.8)O3,PZT] 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.
PY - 2002
SP - 141011
EP - 141017
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 - 01631829
ER -