Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 54, Issue 12, Pages 3146-3151Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2007.908867
Keywords
conduction mechanism; nonvolatile memory (NVM); resistive random access memory (RRAM); resistive switching; SrZrO3; switching polarity
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In this paper, nonpolar resistive switching behavior is reported for the first time in a SZO-based memory device. The electrode materials used which have different conductivities affect the resistive switching properties of the device. The A1/V:SZO-LNO/Pt device shows nonpolar switching behavior, whereas the A1/V:SZO/LNO device has bipolar switching property. The resistance ratios of these two devices are quite distinct owing to the difference between the resistance of low resistance states. The A1/V:SZO-LNO/Pt device with lower resistive switching voltages (+/- 7 V turn on and 2 V turn off) and higher resistance ratio (10(7)) is more suitable for practical applications compared to the A1/V:SZO/LNO device. The switching speed of the A1/V:SZO-LNO/Pt device is 10 ns, which is the fastest speed that has ever been reported. The conduction mechanisms, nondestructive readout property, retention time, and endurance of this device are also reported in this paper.
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