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Improved ferroelectric and leakage properties in symmetric BiFeO3/SrTiO3 superlattice

Bose, Somenath and Krupanidhi, SB (2007) Improved ferroelectric and leakage properties in symmetric BiFeO3/SrTiO3 superlattice. In: Applied Physics Letters, 90 (21). p. 212902.

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Symmetric BiFeO3/SrTiO3 superlattices were fabricated by pulsed laser deposition on SrTiO3 (100) substrates. Frequency independent and near saturated P-E hysteresis was observed in the case of a superlattice (periodicity of ∼ 11 nm) as compared to leaky hysteresis observed in epitaxial BiFeO3. Room temperature leakage current density of the superlattice was almost two orders of magnitude lower than that of BiFeO3. Observed leakage current behavior in case of both BiFeO3 and superlattice indicates the dominance of space charge limited conduction. Improvement in ferroelectric property was discussed in connection to enhanced epitaxial strain, reduced leakage current, and electrostatic interaction between BiFeO3 and SrTiO3.

Item Type: Journal Article
Publication: Applied Physics Letters
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 03 Jan 2012 08:50
Last Modified: 03 Jan 2012 08:50
URI: http://eprints.iisc.ac.in/id/eprint/43009

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