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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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.
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container_issue 13
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container_title Applied physics letters
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description 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.
doi_str_mv 10.1063/1.122297
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title Compensation doping of Ba0.7Sr0.3TiO3 thin films
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