title: First-order reversal curve probing of spatially resolved polarization switching dynamics in ferroelectric nanocapacitors.
abstract: Spatially resolved polarization switching in ferroelectric nanocapacitors was studied on the sub-25 nm scale using the first-order reversal curve (FORC) method. The chosen capacitor geometry allows both high-veracity observation of the domain structure and mapping of polarization switching in a uniform field, synergistically combining microstructural observations and probing of uniform-field polarization responses as relevant to device operation. A classical Kolmogorov-Avrami-Ishibashi model has been adapted to the voltage domain, and the individual switching dynamics of the FORC response curves are well approximated by the adapted model. The comparison with microstructures suggests a strong spatial variability of the switching dynamics inside the nanocapacitors.
authors.affiliation: The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. kimy4@ornl.gov
authors.forename: Yunseok
authors.initials: Y
authors.lastname: Kim
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.forename: Oleg
authors.initials: O
authors.lastname: Ovchinnikov
authors.forename: Stephen
authors.initials: S
authors.lastname: Jesse
authors.forename: Hee
authors.initials: H
authors.lastname: Han
authors.forename: Daniel
authors.initials: D
authors.lastname: Pantel
authors.forename: Ionela
authors.initials: I
authors.lastname: Vrejoiu
authors.forename: Woo
authors.initials: W
authors.lastname: Lee
authors.forename: Dietrich
authors.initials: D
authors.lastname: Hesse
authors.forename: Marin
authors.initials: M
authors.lastname: Alexe
authors.forename: Sergei V
authors.initials: SV
authors.lastname: Kalinin
mesh_terms: D003198:Computer Simulation; D025802:Electric Capacitance; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size