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On the nature of colour centres in oxygen-deficient BaTiO3 single crystals

О ХАРАКТЕРЕ ЦЕНТРОВ ОКРАСКИ В МОНОКРИСТАЛЛАХ ВаТiO3 С НЕДОСТАТКОМ КИСЛОРОДА

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Cechoslovackij fiziceskij zurnal B Aims and scope

Abstract

A study was made of the conditions under which oxygen non-stoichiometry of BaTiO3 single crystals is created by their thermal treatment in atmospheres with different partial pressure of oxygen. Two bands with maxima at 0·48μ and 0·64μ were found in the visible region in the absorption spectrum of crystals deficient in oxygen. An attempt was made to find an interpretation of the structure of non-stoichiometric BaTiO3 and a model of the appropriate colour centre was proposed for the band with a maximum at 0·64μ.

Abstract

Исследовались условия возникновения нестехиометрии кислорода монокристаллов BaTiO3 при температурной обработке в атмосферах с различным парциальным давлением кислорода. В спектре поглощения кристаллов с недостатком кислорода обнаружены две полосы с максимумами 0,48 μ и 0,64 μ. Сделана попытка интерпретировать структуру нестехиометрическо го BaTiO3; для полосы с максимумом 0,64 μ предло жена модель соответствую щего центра окраски.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Prague

    P. Coufová & H. Arend

Authors
  1. P. Coufová
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  2. H. Arend
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Additional information

The authors thank V. Dvořák and V. Janovec from the Institute of Physics, Czechoslovak Academy of Sciences, Dr. A. Bohun from the Institute of Technical Physics, Czechoslovak Academy of Sciences, for very Valuable discussions.

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Coufová, P., Arend, H. On the nature of colour centres in oxygen-deficient BaTiO3 single crystals. Czech J Phys 11, 416–423 (1961). https://doi.org/10.1007/BF01698383

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  • DOI: https://doi.org/10.1007/BF01698383

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