Negative resistance characterisation and defective trap exploration in ZnO nonvolatile memory devices Online publication date: Sat, 15-Nov-2014
by Fu-Chien Chiu; Chih-Yao Huang; Wen-Yuan Chang; Tung-Ming Pan
International Journal of Nanotechnology (IJNT), Vol. 11, No. 1/2/3/4, 2014
Abstract: In this work, Pt/ZnO/Pt capacitors were fabricated and investigated for nonvolatile memory applications. The memory devices exhibit bipolar resistance switching characteristics. Using a current-bias method, a negative resistance or snapback characteristic is observed when the memory device switches from a high-resistance state to a low-resistance state owing to the formation of filamentary conducting path. With DC cycling endurance tests, the more set/reset switching cycles are performed, the more times of snapbacks are found. The multiple snapbacks are associated with the additional conducting filaments formed nearby the original filament. By the explorations of temperature-dependent current-voltage characteristics and X-ray photoelectron spectroscopy spectra, the filaments may be related to the defect state of interstitial zinc with the trap spacing of 2 nm and the trap energy level of 0.46 eV in ZnO films.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Nanotechnology (IJNT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com