title: Picosecond snapshot of the speckles from ferroelectric BaTiO3 by means of x-ray lasers.
abstract: A picosecond x-ray laser speckle has been conducted to study the dynamics of a disordered surface domain structure (BaTiO3 with 90 degrees c/a domains) as a function of temperature for the first time. The transient surface structures induced by ferroelectric domains decrease as temperature increases towards the Curie temperature T(c) and completely disappear above T(c). The dramatic change of the spatial configuration of the c/a domains was observed to occur from a temperature 2 degrees C below T(c), near which the average correlated domain size at equilibrium decreases as (T(c)-T)(0.37+/-0.02).
authors.affiliation: Advanced Photon Research Center, Japan Atomic Energy Research Institute, 8-1, Umemidai, Kizu, Kyoto, 619-0215, Japan.
authors.forename: R Z
authors.initials: RZ
authors.lastname: Tai
authors.forename: K
authors.initials: K
authors.lastname: Namikawa
authors.forename: M
authors.initials: M
authors.lastname: Kishimoto
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Sukegawa
authors.forename: N
authors.initials: N
authors.lastname: Hasegawa
authors.forename: T
authors.initials: T
authors.lastname: Kawachi
authors.forename: M
authors.initials: M
authors.lastname: Kado
authors.forename: P
authors.initials: P
authors.lastname: Lu
authors.forename: K
authors.initials: K
authors.lastname: Nagashima
authors.forename: H
authors.initials: H
authors.lastname: Daido
authors.forename: H
authors.initials: H
authors.lastname: Maruyama
authors.forename: A
authors.initials: A
authors.lastname: Sawada
authors.forename: M
authors.initials: M
authors.lastname: Ando
authors.forename: Y
authors.initials: Y
authors.lastname: Kato