No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
Elemental intermixing within an ultrathin SrRuO3
electrode layer in epitaxial heterostructure BaTiO3
13.J. P. Velev, C.-G. Duan, J. D. Burton, A. Smogunov, M. K. Niranjan, E. Tosatti, S. S. Jaswal, and E. Y. Tsymbal, Nano Letters 9, 427 (2009).
16.Y. S. Kim, D. H. Kim, J. D. Kim, Y. J. Chang, T. W. Noh, J. H. Kong, K. Char, Y. D. Park, S. D. Bu, J. G. Yoon, and J. S. Chung, Applied Physics Letters 86, 102907 (2005).
19.H. Lu, X. Liu, J. D. Burton, C. W. Bark, Y. Wang, Y. Zhang, D. J. Kim, A. Stamm, P. Lukashev, D. A. Felker, C. M. Folkman, P. Gao, M. S. Rzchowski, X. Q. Pan, C. B. Eom, E. Y. Tsymbal, and A. Gruverman, Advanced Materials 24, 1209 (2012).
Article metrics loading...
Aberration corrected scanning transmission electron microscopy is used to directly observe atom columns in an epitaxial BaTiO3thin film deposited on a 3.6 nm-thick SrRuO3electrode layer above an SrTiO3 (001) substrate. Compositional gradients across the heterointerfaces were examined using electron energy-loss spectroscopy techniques. It was found that a small amount of Ba and Ti had diffused into the SrRuO3 layer, and that this layer contained a non-negligible concentration of oxygen vacancies. Such point defects are expected to degrade the electrode’s electronic conductivity drastically, resulting in a much longer screening length. This may explain the discrepancy between experimental measurements and theoretical estimates of the ferroelectric critical thickness of a BaTiO3ferroelectric barrier sandwiched between metallic SrRuO3electrodes, since theoretical calculations generally assume ideal (stoichiometric) perovskite SrRuO3.
Full text loading...
Most read this month