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Structural Response of BaTiO3/CaTiO3 Superlattice to Applied Electric Fields

Published online by Cambridge University Press:  31 January 2011

Ji Young Jo ,
Rebecca Sichel ,
Ho Nyung Lee ,
Eric Dufresne  and
Paul Evans
Ji Young Jo
Affiliation:
cycho@wisc.edu, University of Wisconsin-Madison, Madison, Wisconsin, United States
Rebecca Sichel
Affiliation:
sichel@wisc.edu, University of Wisconsin-Madison, Madison, Wisconsin, United States
Ho Nyung Lee
Affiliation:
hnlee@ornl.gov, Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
Eric Dufresne
Affiliation:
dufresne@aps.anl.gov, Argonne National Laboratory, Advanced Photon Source, Argonne, Illinois, United States
Paul Evans
Affiliation:
evans@engr.wisc.edu, University of Wisconsin-Madison, Madison, Wisconsin, United States
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Abstract

The structural response of a ferroelectric BaTiO3/dielectric CaTiO3 superlattice to the bipolar applied electric field was studied using time-resolved x-ray microdiffraction. Structural results were compared to the polarization-electric field hysteresis curve obtained from electrical measurements. The superlattice x-ray reflections were found to have a broad distribution of intensity in reciprocal space under applied electric fields exceeding the nominal coercive electric field. The broad distribution of the lattice constant at high electric fields is compared with a model in which the constituent layers of the superlattice have different coercive fields for the polarization switching.

Keywords

x-ray diffraction (XRD)ferroelectricitypiezoresponse
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1199: Symposium F –Multiferroic and Ferroelectric Materials , 2009 , 1199-F01-06
Copyright
Copyright © Materials Research Society 2010

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