The influence of crystallinity on the resistive switching behavior of TiO2
The resistive switching characteristics of Pt/TiO2/Al devices were investigated. Amorphous and rutile TiO2 samples were prepared and electrically characterized. The amorphous sample was sputtered at room temperature. The rutile phase of the TiO2 was prepared by sputtering at elevated temperatures of 500C. Without an electroforming process, the amorphous sample showed bipolar resistive switching in low current mode. Switchable rectifying effects have been demonstrated in this mode. After applying the electroforming process on the rutile or amorphous device both samples exhibited a bipolar switching in high current mode. Amorphous titanium oxide showed low and high current mode bipolar switching in one device.
resistive switching tio2 amorphous rutile titanium dioxide resistive ram rram