Lattice Dynamics of Laser Excited Ferroelectric BaTiO_3

• Authors: D. Issenmann , S. Schleef , S. Ibrahimkutty , G. Buth , T. Baumbach , A. Plech , M. Beyer , J. Demsar
• Languages of publication: EN

Abstracts

EN

We investigated the lattice dynamics of the prototypic ferroelectric barium titanate close to its ferroelectric-paraelectric phase transition aiming at a better understanding of the atomistic nature of the transition. The usage of time-resolved X-ray techniques allows to disentangle lattice motion and unit cell changes, which, in part, relate to the ferroelectric polarization. In the quasi-static case both the electrical and the laser excitation show a mean-field, simple thermal behaviour, while for time scales shorter than nanoseconds the impulsive nature of the excitation becomes visible.

Keywords

EN

78.47.D-; 61.05.cp; 77.22.Ej; 65.40.De; 64.60.Cn

Discipline

• 65.40.De: Thermal expansion; thermomechanical effects
• 77.22.Ej: Polarization and depolarization
• 61.05.cp: X-ray diffraction
• 78.47.D-: Time resolved spectroscopy (>1 psec)
• 64.60.Cn: Order-disorder transformations(see also 81.30.Hd Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder in materials science; for effects of disorder on superconducting transition temperature, see 74.62.En)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 2
• Pages: 319-323

Dates

published

2012-02

Contributors

author

D. Issenmann

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

S. Schleef

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

S. Ibrahimkutty

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

G. Buth

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

T. Baumbach

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

A. Plech

• Institute for Synchrotron Radiation, KIT, Postfach 3640, D-76021 Karlsruhe, Germany

author

M. Beyer

• Center for Applied Photonics, University of Konstanz, Universitätsstr. 10, D-78457 Konstanz, Germany

author

J. Demsar

• Center for Applied Photonics, University of Konstanz, Universitätsstr. 10, D-78457 Konstanz, Germany

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Identifiers

DOI

10.12693/APhysPolA.121.319