X-ray photoelectron spectroscopy and electrical properties studies of nonstoichiometric Nb2O5-doped strontium titanate ceramics prepared by sol-precipitation process

Hung, Kun-Ming; Yang, Wein-Duo

doi:10.1016/s0921-5093(02)00826-2

Cited by 4 publications

(1 citation statement)

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“…In Sr-deficient SrTiO 3 , reduction leads to the creation of Ti-rich phases [36], which have been found particularly in doped SrTiO 3 [37][38][39][40][41]. Further reduction of TiO 2 can then lead to the formation of substoichiometric titanium oxides such as Magnéli phases [42]:…”

Section: Introductionmentioning

confidence: 99%

Cluster-like resistive switching of SrTiO₃:Nb surface layers

et al. 2013

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The understanding of the resistive switching mechanisms in perovskites is of particular importance for the development of novel non-volatile memories. Nanoscale investigations recently revealed that in the model material SrTiO 3 a filamentary type of switching is present. In this paper, we show that upon donor doping with Nb the switching type changes fundamentally. We report on the observation of conducting clusters that can be switched independently between a high resistance and a low resistance state when applying a voltage. Furthermore, we show that the resistive switching takes place in a semiconducting surface layer on top of the metallic bulk of SrTiO 3 :Nb single crystals, which can change its properties easily under external gradients.

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