Compensation doping of Ba0.7Sr0.3TiO3 thin films

We have investigated the effects of Mn impurities on Ba0.7Sr0.3TiO3 thin films using x-ray photoemission spectroscopy. Mn acts as an electron acceptor, compensating for the charge density found in nominally undoped films. This causes a greatly increased depletion width in acceptor-doped films. We al...

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Bibliographic Details
Published in:Applied physics letters 1998-09, Vol.73 (13), p.1832-1834
Main Authors: Copel, M., Baniecki, J. D., Duncombe, P. R., Kotecki, D., Laibowitz, R., Neumayer, D. A., Shaw, T. M.
Format: Article
Language:English
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Summary:We have investigated the effects of Mn impurities on Ba0.7Sr0.3TiO3 thin films using x-ray photoemission spectroscopy. Mn acts as an electron acceptor, compensating for the charge density found in nominally undoped films. This causes a greatly increased depletion width in acceptor-doped films. We also present evidence that acceptor-doped films have an increased barrier to thermionic emission of electrons from Pt contacts into the dielectric. This may explain the decrease in leakage current observed in some acceptor-doped titanates.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.122297