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. 2018 Mar 2;19(1):221–230. doi: 10.1080/14686996.2018.1440136

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© 2018 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Investigated models of bulk SrTiO₃, bulk iron-doped SrTiO₃ without oxygen vacancies, bulk iron-doped SrTiO₃ with one oxygen vacancy per two iron atoms, SrO terminated surface of SrTiO₃, SrO terminated surface of iron-doped SrTiO₃ without oxygen vacancies, SrO terminated surface of iron-doped SrTiO₃ with oxygen vacancy in the surface layer, and SrO terminated surface of iron doped SrTiO₃ with oxygen vacancy in the subsurface layer.