Pulse-Programming Instabilities of Unipolar-Type NiOx

Oscillations in the transient current profiles of resistive switching memory during set and reset pulse programming were observed and explained by the repeated threshold switching (instantaneous set/reset programming) due to the unstably applied voltage on the resistive random access memory cell during switching. Adding a feedback circuit to prevent the observed oscillations as well as limiting the parasitic capacitance are needed for stable unipolar resistive memory switching.