Oxygen ion drift-driven dual bipolar hysteresis curves in a single Pt/Ta2O5-x/TiOxNy framework

Ah Rahm Lee, Yoon Cheol Bae, Gwang Ho Baek, Je Bock Chung, Tae Sung Kang, Jong Sun Lee, Jea Gun Park, Hyun Sik Im, Jin Pyo Hong

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3 Scopus citations

Abstract

We describe abnormal dual bipolar resistive switching events in simple Pt/Ta2O5-x/TiOxNy and Pt/Ta 2O5-x/TiN matrices in which the typical switching directions (SD) are initially clockwise (CW). The negative difference region in a high resistance state before reaching the typical "CW set" process enables the SD transition to a counterclockwise direction. It thereby emphasizes the occurrence of a highly stable secondary bipolar resistive switching curve. The origin of two different switching modes is described by adapting a bias-dependent oxygen ion accumulation and depletion process at TiO xNy and TiN electrode interfaces and by performing various structural analyses.

Original languageEnglish
Article number183510
JournalApplied Physics Letters
Volume103
Issue number18
DOIs
StatePublished - 28 Oct 2013

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