Non-Ohmic conduction in exfoliated La0.7Ca0.3MnO3 thin films

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We present a strong non-Ohmic transport characteristic of the exfoliated La0.7Ca0.3MnO3 thin film obtained by growing a water-soluble sacrificial layer of Sr3Al2O6 between the SrTiO3 substrate and the La0.7Ca0.3MnO3 film. The non-Ohmic conduction manifests itself as a significant amount of electroresistance over a wide range of temperatures. The resistance shows a plateaulike feature at low temperatures, and the electroresistance reaches ∼50 000% at 10 K for input currents varying from 1024 nA to 125 pA. The structural characterization of the exfoliated film reveals the existence of antiphase boundaries, the tunneling through which appears to cause the non-Ohmic feature. Our results provide an avenue into colossal tunneling electroresistance mediated by crystallographic defects.
Publisher
AMER INST PHYSICS
Issue Date
2020-01
Language
English
Article Type
Article
Citation

APPLIED PHYSICS LETTERS, v.116, no.2, pp.022401

ISSN
0003-6951
DOI
10.1063/1.5127355
URI
http://hdl.handle.net/10203/271838
Appears in Collection
PH-Journal Papers(저널논문)
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