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Layer structures BaO-BaTiO3 in the region of p-type conductivity on the surface of BaTiO3

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Abstract

X-ray diffraction measurements on the surface of polycrystalline BaTiO3 show that a reversible process of defect segregation occurs in the temperature range from 500 to 1000° C and in the air pressure range from 10−2 to 760 torr. This causes the appearance and disappearance of new crystalline phases of the formula Ba n+1Ti n O3n+1 (n=1,2,3). These findings amend the present defect models developed on the basis of measurements of the p-type equilibrium conductivity as a function of oxygen partial pressure.

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Author notes

  1. K. Szot

    Present address: Institute of Physics, Silesian University, Uniwersytecka 4, PL-40-007, Katowice, Poland

Authors and Affiliations

  1. Institut für Festkörperforschung, KFA Jülich, Postfach 1913, W-5170, Jülich, Germany

    K. Szot & M. Pawełczyk

  2. Zentralabteilung für Chemische Analysen, KFA Jülich, Postfach 1913, W-5170, Julich, Germany

    C. Freiburg & M. Pawełczyk

Authors
  1. K. Szot
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  2. C. Freiburg
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  3. M. Pawełczyk
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Szot, K., Freiburg, C. & Pawełczyk, M. Layer structures BaO-BaTiO3 in the region of p-type conductivity on the surface of BaTiO3 . Appl. Phys. A 53, 563–567 (1991). https://doi.org/10.1007/BF00331547

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  • DOI: https://doi.org/10.1007/BF00331547

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