title: Field-dependent domain distortion and interlayer polarization distribution in PbTiO3/SrTiO3 superlattices.
abstract: The remnant polarization of weakly coupled ferroelectric-dielectric superlattices is distributed unequally between the component layers, and as a result the components respond differently to applied electric fields. The difference is apparent in both the nanometer-scale structure of striped polarization domains and in the development of piezoelectric strain and field-induced polarization. Both effects are probed with in situ time-resolved synchrotron x-ray diffraction in a PbTiO(3)/SrTiO(3) superlattice in fields up to 2.38 MV/cm. Domains are initially distorted to increase the polarization in the SrTiO(3) layer while retaining the striped motif. The subsequent transformation to a uniform polarization state at a later time leads to piezoelectric expansion dominated by the field-induced polarization of the SrTiO(3) layers. The results are consistent with theoretical predictions of the field dependence of the domain structure and electrical polarization.
authors.affiliation: Department of Materials Science and Engineering & Materials Science Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Pice
authors.initials: P
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering & Materials Science Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Margaret P
authors.initials: MP
authors.lastname: Cosgriff
authors.affiliation: Department of Materials Science and Engineering & Materials Science Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Qingteng
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.
authors.forename: Sara J
authors.initials: SJ
authors.lastname: Callori
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Bernhard W
authors.initials: BW
authors.lastname: Adams
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Eric M
authors.initials: EM
authors.lastname: Dufresne
authors.affiliation: Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA.
authors.forename: Matthew
authors.initials: M
authors.lastname: Dawber
authors.affiliation: Department of Materials Science and Engineering & Materials Science Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors.forename: Paul G
authors.initials: PG
authors.lastname: Evans