The dc leakage behavior of asymmetric superlattices has been studied over a wide range of temperatures between 30 and . Leakage current characteristics analyzed in the light of different models indicated dominant Poole–Frenkel emission in the lower electric field region. Activation energy calculated from the Poole–Frenkel model was in the range of 0.19–0.34 eV for different superlattice periodicities. For the superlattices with lower periodicities (6 nm) dc leakage current in the low electric field region was dominated collectively by both Ohmic and Poole–Frenkel conduction mechanisms. At higher applied electric fields space charge limited conduction was found to be the dominant mechanism for all the superlattices. Realization of leakage mechanism over different temperatures and voltages can help in strategic interface engineering of these superlattices for device applications.
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15 November 2008
Research Article|
November 17 2008
dc leakage mechanism in artificial biferroic superlattices
Ayan Roy Chaudhuri;
Ayan Roy Chaudhuri
Materials Research Centre,
Indian Institute of Science
, Bangalore 560 012, India
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S. B. Krupanidhi
S. B. Krupanidhi
a)
Materials Research Centre,
Indian Institute of Science
, Bangalore 560 012, India
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a)
Author to whom correspondence should be addressed. Electronic addresses: sbk@mrc.iisc.ernet.in addresses ayan@mrc.iisc.ernet.in. FAX: +9180 2360 7316.
J. Appl. Phys. 104, 104102 (2008)
Article history
Received:
September 18 2008
Accepted:
September 22 2008
Citation
Ayan Roy Chaudhuri, S. B. Krupanidhi; dc leakage mechanism in artificial biferroic superlattices. J. Appl. Phys. 15 November 2008; 104 (10): 104102. https://doi.org/10.1063/1.3020522
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