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Peculiar Features of the Dielectric Response in Lead Scandium Tantalate Pb(Sc1/2Ta1/2)O3 Thin Films

Published online by Cambridge University Press:  26 February 2011

Kyle Brinkman ,
Alexander Tagantsev ,
Vladimir Cherman ,
Yongli Wang ,
Nava Setter ,
Stanislav Kamba  and
Jan Petzelt
Kyle Brinkman
Affiliation:
kyle.brinkman@a3.epfl.ch, AIST, Hydrogen Dymanics in Metals, AIST Tsukuba Central 5, Tsukuba 305-8565, Japan, Tsukuba, 305-8565, Japan, +81298615080 ext 55254
Alexander Tagantsev
Affiliation:
alexander.tagantsev@epfl.ch, Ecole Polytechnique Federale de Lausanne (EPFL), Ceramics Laboratory, Lausanne, CH-1015, Switzerland
Vladimir Cherman
Affiliation:
vladimir.cherman@epfl.ch, Ecole Polytechnique Federale de Lausanne (EPFL), Ceramics Laboratory, Lausanne, CH-1015, Switzerland
Yongli Wang
Affiliation:
yongli.wang@epfl.ch, Ecole Polytechnique Federale de Lausanne (EPFL), Ceramics Laboratory, Lausanne, CH-1015, Switzerland
Nava Setter
Affiliation:
nava.setter@epfl.ch, Ecole Polytechnique Federale de Lausanne (EPFL), Ceramics Laboratory, Lausanne, CH-1015, Switzerland
Stanislav Kamba
Affiliation:
kamba@fzu.cz, Academy of Sciences of the Czech Republic, Institute of Physics, Na Slovance 2, Prague, 182 21, Czech Republic
Jan Petzelt
Affiliation:
petzelt@fzu.cz, Academy of Sciences of the Czech Republic, Institute of Physics, Na Slovance 2, Prague, 182 21, Czech Republic
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Abstract

An examination of the low temperature (20 K) dielectric permittivity revealed dispersion between the MHz and THz frequencies in both disordered and ordered Pb(Sc1/2Ta1/2)O3 (PST) thin films. The difference between the lattice contribution in the THz regime and that measured in the MHz regime at extremely low temperatures points to the peculiar contribution of polar regions which maintain their mobility on cooling. Experiments measuring the permittivity upon cooling under an electric bias field revealed an additional peculiar feature of polar regions in disordered PST thin films: the application of a DC field of 30kV/cm failed to induce a phase transition to a long range polar state.

Keywords

thin filmdielectric propertiessol-gel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 966: Symposium T – Ferroelectrics and Multiferroics , 2006 , 0966-T07-37
Copyright
Copyright © Materials Research Society 2007

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References

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