Resistance Transition in NiO Thin Film and Its Temperature Dependence

Abstract

Reversible bi-stable on and off conduction states are examined on Cu/NiO/Pt structure prepared by thermal oxidation of deposited Ni layer. Unipolar resistive switching behavior is obtained with negative operation voltage and the on-state current decreases with temperature. This transition polarity and temperature dependence both agree with the presence of p-type NiO conduction and the diffusive Cu top electrode. The current-voltage plots in full-log interpret different off state conduction properties in low and high electric field, and also help to perceive the temperature effect on off-state current. The off-state impedance spectroscopy at 25°C−85°C provides consistent observation on the off-state transport characteristics.