Non-linear electrical conduction and broadband noise in charge-ordered rare earth manganate Nd0.5Ca0.5MnO3
Abstract
Measurements of the dc transport properties and the low-frequency conductivity noise in films of charge ordered Nd0.5Ca0.5MnO3 grown on Si subtrate reveal the existence of a threshold field in the charge ordered regime beyond which strong non linear conduction sets in along with a large broad band conductivity noise. Threshold-dependent conduction disappears as T -> TCO, the charge ordering temperature. This observation suggests that the charge ordered state gets depinned at the onset of the non-linear conduction.
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