Dynamic threshold switching Behavior of Ge2Sb2Te5and Sb-doped Ge2Sb2Te5thin films using scanning electrical nanoprobe

P. Zhou, Y. C. Shin, B. J. Choi, S. Choi, C. S. Hwang, Y. Y. Lin, H. B. Lv, X. J. Yan, T. A. Tang, L. Y. Chen, B. M. Chen

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Abstract

The dynamic oscillation in the current-time characteristics of Ge2 Sb2 Te5 and Sb-doped Ge2 Sb2 Te5 thin-film materials was investigated using a scanning electrical nanoprobe. The dynamic oscillation was attributed to the threshold switching of the amorphous-phase Ge2 Sb2 Te5 and doped Ge2 Sb2 Te5 thin films. The microscopic mechanism of the threshold switching behavior was also studied. X-ray diffraction showed that the excess Sb improved the crystallization of Ge2 Sb2 Te5 during postannealing at 300°C. Sb-doping also increased the threshold switching speed.

Original languageEnglish
Pages (from-to)281-283
Number of pages3
JournalElectrochemical and Solid-State Letters
Volume10
Issue number9
DOIs
StatePublished - 1 Jan 2007

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