dc leakage mechanism in artificial biferroic superlattices

Chaudhuri, Ayan Roy ; Krupanidhi, S. B. (2008) dc leakage mechanism in artificial biferroic superlattices Journal of Applied Physics, 104 (10). 104102_1-104102_6. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v104/i10/p104...

Related URL: http://dx.doi.org/10.1063/1.3020522


The dc leakage behavior of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3/La0.6Sr0.4MnO3 asymmetric superlattices has been studied over a wide range of temperatures between 30 and 200° C. 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.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:19327
Deposited On:23 Nov 2010 13:08
Last Modified:04 Jun 2011 11:09

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