M. Dawber et al., Effect of donor and acceptor dopants on Schottky barrier heights and vacancy concentrations in barium strontium titanate, J EUR CERAM, 21(10-11), 2001, pp. 1633-1636
This paper discusses the effect of donors and acceptors on the electronic b
and structure and defect properties of Ba0.7Sr0.3TiO3 film (BST). Based on
X-Ray Photoelectron Spectroscopy (XPS) data and an extension of previous wo
rk by Robertson and Chen (Robertson, J. and Chen, C. W., Schottky barrier h
eights of tantalum oxide, barium strontium titanate, lead titanate, and str
ontium bismuth tantalate. Appl. Phys. Lett., 1999, 74, 1168-1170), Schottky
barrier heights are calculated for BST films in which La and Mn dopants ha
ve been added (0.7%). The barrier height expression of Cowley and Sze (Cowl
ey, A. M. and Sze, S. M., Journal of Applied Physics, 1965, 36, 3212) is di
scussed with attention to the term neglected in their original paper. The e
ffect of dopants on the oxygen vacancy concentration is also discussed. (C)
2001 Elsevier Science Ltd. All rights reserved.