Pulse-Induced Resistivity Modulation of Pt/Ti_0.99Sc_0.01O_2-δ/Pt Multilayer with Electron-Ion Mixed Conduction

抄録

Pulsed-induced resistivity modulation of a Pt/Ti_0.99Sc_0.01O_2-δ/Pt multilayer with a cross-point structure was investigated. This multilayer exhibits nonlinear current–voltage characteristic based on the Schottky barrier at the Pt/Ti_0.99Sc_0.01O_2-δ interface. When the electrical pulses of 1.5 V were applied with short interval time of 10 s, the resistivity modulation corresponding to the long-term-memorization (LTM) were observed. X-ray photoemission spectroscopy showed O-H bond that contributes to electron-proton mixed conduction at the Pt/Ti_0.99Sc_0.01O_2-δ interface. This LTM resistivity modulation is considered to be due to the local proton migration at the Pt/Ti_0.99Sc_0.01O_2-δ interface, and the operation voltage is lower than that of the reported oxide multilayer.