Publication Type:Journal Article
Source:Applied Physics Letters, Volume 94, Number 23 (2009)
Keywords:Capacitance, Capacitors, Current-voltage measurements, electrode interface, Electrolytic capacitors, Nuclear physics, platinum, Potential barriers, Pt electrode, pulsed laser deposition, substrates, Temperature range
The leakage current in epitaxial BiFeO3 capacitors with bottom SrRuO3 and top Pt electrodes, grown by pulsed laser deposition on SrTiO3 (100), SrTiO3 (110), and SrTiO3 (111) substrates, is investigated by current-voltage (I-V) measurements in the 100-300 K temperature range. It is found that the leakage current is interface-limited and strongly dependent on the orientation of the substrate. The potential barriers at the electrode interfaces are estimated to about 0.6, 0.77, and 0.93 eV for the (100), (110), and (111) orientations, respectively. © 2009 American Institute of Physics.
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