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Improved ferroelectric and leakage properties in symmetric $BiFeO_3 /SrTiO_3$ superlattice

Bose, Somenath and Krupanidhi, B (2007) Improved ferroelectric and leakage properties in symmetric $BiFeO_3 /SrTiO_3$ superlattice. In: Applied Physics Letters, 90 (21). 212902 1-21902 3.

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Symmetric $BiFeO_3 /SrTiO_3$ superlattices were fabricated by pulsed laser deposition on $SrTiO_3$ (100) substrates. Frequency independent and near saturated P-E hysteresis was observed in the case of a superlattice(periodicity of $\sim 11 nm$) as compared to leaky hysteresis observed in epitaxial $BiFeO_3$. Room temperature leakage current density of the superlattice was almost two orders of magnitude lower than that of $BiFeO_3$. Observed leakage current behavior in case of both $BiFeO_3$ 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 $BiFeO_3$ and $SrTiO_3$.

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: 26 Jul 2007
Last Modified: 19 Sep 2010 04:38
URI: http://eprints.iisc.ac.in/id/eprint/11585

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