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 language||English (US)|
|Journal||Applied Physics Letters|
|State||Published - 2008|
Bibliographical noteFunding 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)