Figure 5
Semi-log plots of the I-V characteristic of 2 × 2 mm2 MR devices (Cu/HfO2/p++ Si) from (a) sample A and (b) sample B samples, showing 50 SET-RESET cycles. Si BE is grounded, while positive voltage is applied for the SET sweep, and negative voltage for the RESET sweep. The compliance current (CC) is fixed at 100 μA during the SET operation, while it is kept at 0.1 A during the RESET cycle. All of the 50 SET-RESET cycles are presented in grey scale, while one representative cycle is shown in red color to illustrate one single SET-RESET switching cycle. Arrows indicate the direction of the change in measured current during the SET and RESET transitions. Inset in (b) shows an example of single SET-RESET sweep cycle.
