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Improved resistive switching memory characteristics in a W/Ti/Ta2O5/W device with a small size of 150 nm have been investigated for the first time. TEM image shows amorphous Ta2O5 film with a thickness of ~7 nm. Memory device has a good repeatable bipolar memory behavior and a large sensing margin of ~2000. The memory device has shown good endurance of at least 104 cycles and excellent data retention...
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