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Engineering the Switching Dynamics of TiOx based RRAM with Al Doping

Trapatseli, Maria, Khiat, A, Cortese, S, Serb, A, Carta, Daniela and Prodromakis, T (2016) Engineering the Switching Dynamics of TiOx based RRAM with Al Doping Journal of Applied Physics, 120 (2). 025108-1.

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Titanium oxide (TiOx) has attracted a lot of attention as an active material for resistive random access memory (RRAM), due to its versatility and variety of possible crystal phases. Although existing RRAM materials have demonstrated impressive characteristics, like ultra-fast switching and high cycling endurance, this technology still encounters challenges like low yields, large variability of switching characteristics, and ultimately device failure. Electroforming has been often considered responsible for introducing irreversible damage to devices, with high switching voltages contributing to device degradation. In this paper, we have employed Al doping for tuning the resistive switching characteristics of titanium oxide RRAM. The resistive switching threshold voltages of undoped and Al-doped TiOx thin films were first assessed by conductive atomic force microscopy. The thin films were then transferred in RRAM devices and tested with voltage pulse sweeping, demonstrating that the Al-doped devices could on average form at lower potentials compared to the undoped ones and could support both analog and binary switching at potentials as low as 0.9 V. This work demonstrates a potential pathway for implementing low-power RRAM systems.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
Trapatseli, Maria
Khiat, A
Cortese, S
Serb, A
Prodromakis, T
Date : 13 July 2016
Funders : EPSRC - Engineering and Physical Sciences Research Council
DOI : 10.1063/1.4958672
Copyright Disclaimer : Reproduced from M.Trapatseli, A.Khiat, S.Cortese, A. Serb, D. Carta,T. Prodromakis, Journal of Applied Physics,volume 120, page no's 025108-1-025108-6,2016, with the permission of AIP Publishing.
Depositing User : Jane Hindle
Date Deposited : 05 Sep 2017 13:41
Last Modified : 11 Dec 2018 11:23

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