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Characterization of nonOhmic electrical transport in double perovskite compounds through bias scale and nonlinearity exponent
D CHAKRABORTY, U N NANDI, , P DASGUPTA, A PODDAR
Published in Elsevier Ltd
2017
Volume: 100
   
Pages: 19 - 24
Abstract
Scaling analysis of nonOhmic electrical transport in double perovskite (DP) compounds like La2NiMnO6 and Sr2Fe0.3Mn0.7MoO6 is presented over a wide range of electric bias and temperatures. It is shown that the voltage V0(T) at which conductance deviates from its Ohmic value Σ0(T) scales with Σ0(T) as V0(T)∼Σ0(T)xT, xT being the onset exponent characterizing the onset of nonOhmic conduction. Interestingly, it was found that xT is negative and insensitive to the nature of conduction mechanism in DPs but is related to the characteristic temperature T0 and the mean hopping length Hm. We provide a scaling formalism in terms of the parameters V0(T) and xT in DPs for deeper understanding of the spintronic application and the electrode functioning in solid oxide fuel cells (SOFC). Inelastic multi-step tunneling is found to be the suitable mechanism of electronic transport characterized completely by these two parameters. © 2016 Elsevier Ltd
About the journal
JournalData powered by TypesetJournal of Physics and Chemistry of Solids
PublisherData powered by TypesetElsevier Ltd
ISSN0022-3697
Open AccessNo