Determination of electronic and ionic partial conductivities of a grain 
boundary: method and application to acceptor-doped SrTiO3

Guo, X.; Fleig, J.; Maier, J.

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Determination of electronic and ionic partial conductivities of a grain boundary: method and application to acceptor-doped SrTiO₃

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Guo, X.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Fleig, J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Maier, J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Guo, X., Fleig, J., & Maier, J. (2002). Determination of electronic and ionic partial conductivities of a grain boundary: method and application to acceptor-doped SrTiO₃. Solid State Ionics, 154-155, 563-569.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F261-3

Abstract

Hebb-Wagner polarization technique was applied to Fe-doped
SrTiO3 single and bicrystals: as far as a single crystal is
concerned, the polarization is complicated by additional
internal redox reactions, and it has to be appropriately
generalized; as far as a bicrystal is concerned, it was
demonstrated how the electronic and ionic partial
conductivities of a grain boundary can be separated with this
technique. The partial conductivities and the charge carrier
concentrations thus obtained clearly demonstrate that the
electronic and the ionic charge carriers are depleted in the
space charge region, more specifically that the depletion of
the ionic ones is more pronounced, being in agreement with the
double charge of oxygen vacancies. (C) 2002 Elsevier Science
B.V. All rights reserved.