Resistive memory devices fabricated from oxygen implanted tantalum exhibited bipolar switching without a forming voltage. The influence of the current limit during SET on the switching properties has been studied using endurance measurements. The SET/RESET voltages did not change with the current limit. The RESET current increased proportionally to the SET current, while the on-state resistance varied inversely to the SET current. These results are consistent with a RESET process that is directly linked to the peak power during SET. The trade-off between the switching endurance and memory window that results from the SET process is also shown.
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Bishop et al. (2012) studied this question.
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