title: Following strain-induced mosaicity changes of ferroelectric thin films by ultrafast reciprocal space mapping.
abstract: We investigate coherent phonon propagation in a thin film of ferroelectric PbZr(0.2)Ti(0.8)O(3) (PZT) by ultrafast x-ray diffraction experiments, which are analyzed as time-resolved reciprocal space mapping in order to observe the in- and out-of-plane structural dynamics, simultaneously. The mosaic structure of the PZT leads to a coupling of the excited out-of-plane expansion to in-plane lattice dynamics on a picosecond time scale, which is not observed for out-of-plane compression.
authors.affiliation: Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Schick
authors.forename: A
authors.initials: A
authors.lastname: Bojahr
authors.forename: M
authors.initials: M
authors.lastname: Herzog
authors.forename: P
authors.initials: P
authors.lastname: Gaal
authors.forename: I
authors.initials: I
authors.lastname: Vrejoiu
authors.forename: M
authors.initials: M
authors.lastname: Bargheer