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

Autor:	P. R. Duncombe, Deborah A. Neumayer, Timothy M. Shaw, David E. Kotecki, M. Copel, Robert B. Laibowitz, J. D. Baniecki
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Photoemission spectroscopy Doping Analytical chemistry Charge density Thermionic emission Dielectric Electron acceptor chemistry Impurity Thin film
Zdroj:	Applied Physics Letters. 73:1832-1834
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.122297
Popis:	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.
Databáze:	OpenAIRE
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