dc leakage behavior and conduction mechanism in (BiFeO3) m(SrTiO3)m superlattices

R. Ranjith*, W. Prellier, Jun Wei Cheah, Junling Wang, Tom Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Leakage current behavior of (BiFeO3)m(SrTiO 3)m superlattice structures was studied and analyzed at different temperatures (303-473 K) in the light of various models. While bulk limited Poole-Frenkel emission was observed to dominate the leakage current in the temperature range of 303-383 K, the space charge limited conduction was observed up to 473 K. With a Poole-Frenkel emission type of conduction, the activation energy range of ∼0.06-0.25 eV was calculated. The physical parameters, calculated from the analysis, correlate with the intrinsic properties. Such analysis of leakage current facilitates interface engineering of heterostructures for device applications.

Original languageEnglish (US)
Article number232905
JournalApplied Physics Letters
Issue number23
StatePublished - 2008
Externally publishedYes

Bibliographical note

Funding Information:
This work was carried out in the frame of the Merlion project (n°2.04.07) supported by the Ministere des Affaires Etrangeres et Européennes and the Nanyang Technological University and the STREP MaCoMuFi (NMP3-CT-2006-033221) supported by the European Commission and by the CNRS, France. Partial support from the ANR (NT05-1-45177 NT05-3-41793) is also acknowledged. The authors would also like to acknowledge Dr. L. Mechin, and Mr. C. Fur.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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