Monodomain to polydomain transition in ferroelectric PbTiO3 thin films with La0.67Sr0.3MnO3 electrodes

Abstract

Finite size effects in ferroelectric thin films have been probed in a series of epitaxial perovskite c-axis oriented PbTiO3 films grown on thin La0.67Sr0.33MnO3 epitaxial electrodes. The film thickness ranges from 480 down to 28 A (7 unit cells). The evolution of the film tetragonality c/a, studied using high resolution x-ray diffraction measurements, shows first a decrease of c/a with decreasing film thickness followed by a recovery of c/a at small thicknesses. This recovery is accompanied by a change from a monodomain to a polydomain configuration of the polarization, as directly demonstrated by piezoresponse atomic force microscopy measurements.

References in corpus (5)

• Ab initio study of BaTiO3 and PbTiO3 surfaces in external electric fields
• Ferroelectricity and tetragonality in ultrathin PbTiO3 films
• Unusual behaviour of the ferroelectric polarization in PbTiO${}_3$/SrTiO${}_3$ superlattices
• A Microscopic Model of Ferroelectricity in Stress-free PbTiO3 Ultrathin Films
• Direct evidence for ferroelectric polar distortion in ultrathin lead titanate perovskite films

Cited by in corpus (6)

• Tuning of the depolarization field and nanodomain structure in ferroelectric thin films
• Equilibrium and Stability of Polarization in Ultrathin Ferroelectric Films with Ionic Surface Compensation
• Thickness-dependent polarization of strained BiFeO3 films with constant tetragonality
• Full field electron spectromicroscopy applied to ferroelectric materials
• Combined electrostatic and strain engineering of BiFeO${}_3$ thin films at the morphotropic phase boundary
• Ferroelectric tunnel junctions