Electrical measurement as memristor behavior

Figure 3: Characteristic I-V behavior as a function of time for the Al–ZnO(15 min)/ZnO(100 min)/ITO/glass sample (ZA1). Voltage sweeps of (0 V–1 V–0 V)×5 and (0 V–(-1) V–0 V)×5 with frequencies of (a) 20 Hz, (b) 10 Hz, (c) 5 Hz, (d) 2.5 Hz, (e) 1.4 Hz, and (f) 1 Hz. The red lines illustrate the voltage sweep while the blue lines represent the measured current.