Resistance Steps and Asymmetric Conduction Induced by Currents in ${\rm La}_{0.8}{\rm Ca}_{0.2}{\rm MnO}_{3}$ Films

Abstract

A constant voltage mode of a power supply was adopted to study the current-induced effects in La0.8Ca0.2MnO3 epitaxial thin films. After processed by a current of the density of ~3 × 105 A/cm2 for 1 minute, they exhibited anisotropic conduction. Like the behavior of p-n junctions, the current starts to increase dramatically in the forward direction at a… (More)

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