Generation and Dynamic Behaviors of Oxygen Vacancies in Barium Strontium Titanate Ceramics

Oxygen vacancy behaviors in Ni-doped barium strontium titanate (BST) ceramics have been observed through thermally stimulated current (TSC) measurements up to 200°C. The set of observations confirmed that the vacancies drift due to a high electric field at an elevated temperature to pile up under th...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 40; no. 9S; pp. 5634 - 5637
Main Authors Fukami, Tatsuo, Agawa, Daisuke, Bamba, Noriko
Format Journal Article
LanguageEnglish
Published 2001
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Summary:Oxygen vacancy behaviors in Ni-doped barium strontium titanate (BST) ceramics have been observed through thermally stimulated current (TSC) measurements up to 200°C. The set of observations confirmed that the vacancies drift due to a high electric field at an elevated temperature to pile up under the cathode electrode and the initial complex defects of acceptor, Ni Ti ′′ , and donor, V O •• , are separated from each other forming a forward-biased pn junction. It is also revealed that the oxygen vacancies are newly generated at the anode area either if the ceramic surface is roughened or if a catalytic electrode such as Pt is attached.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.40.5634