%0 Journal Article
%K Defects
%K Iron compounds
%K Ferroelectric materials
%K Ferroelectricity
%K Calculations
%K Growth rate
%K Lead titanate
%K Lutetium compounds
%K Switching
%K Enhanced polarization
%K First-principles calculation
%K Frequency dispersion
%K Improper ferroelectrics
%K Structural order parameter
%K Switching behaviors
%K Switching dynamics
%K Switching voltages
%A P Barrozo
%A D.R Småbråten
%A Y.-L Tang
%A B Prasad
%A S Saremi
%A R Ozgur
%A V Thakare
%A R.A Steinhardt
%A M.E Holtz
%A V.A Stoica
%A L.W Martin
%A D.G Schlom
%A S.M Selbach
%A Ramamoorthy Ramesh
%B Advanced Materials
%D 2020
%G eng
%I Wiley-VCH Verlag
%R 10.1002/adma.202000508
%T Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3
%X Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth-rate conditions, it is shown that defects can reduce the quasi-static switching voltage by up to 40% in qualitative agreement with first-principles calculations. Switching studies show that the coercive field has a stronger frequency dispersion for the improper ferroelectrics compared to a proper ferroelectric such as PbTiO3. It is concluded that the primary structural order parameter controls the switching dynamics of such improper ferroelectrics. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim