Influence of doping on the properties of vanadium oxide gel films
Authors: Alexander Pergament, Andrei Velichko, Olga Berezina, Elena Kazakova, Nikolai Kuldin, Dmitri Artyukhin
Abstract: Effect of doping with H and W on the properties of V2O5 and VO2 derived from V2O5 gel has been studied. It is shown that the treatment of V2O5 in low-temperature RF hydrogen plasma for 1 to 10 min. leads to either hydration of vanadium pentoxide or its reduction (depending on the treatment conditions) to lower vanadium oxides. For some samples, which are subject to plasma treatment in the discharge active zone, a non-ordinary temperature dependence of resistance, with a maxi-mum at T ~ 100 K, is observed. For W-doped VO2 films, it is shown that substitution of V4+ with W6+ results in a decrease of the temperature of metal-insulator transition. Also, it has been shown that the doping of the initial films with ~3 at.% of W reduces the statistical scatter in the thresh-old parameters of the switching devices with S-shaped I-V characteristics on the basis of V2O5 gel films.
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