Свойства мемристивных структур на основе нанокомпозита (Co-=SUB=-40-=/SUB=-Fe-=SUB=-40-=/SUB=-B-=SUB=-20-=/SUB=-)-=SUB=-x-=/SUB=-(LiNbO-=SUB=-3-=/SUB=-)-=SUB=-100-x-=/SUB=-, синтезированных на SiO-=SUB=-2-=/SUB=-/Si-подложках

Abstract

The structural features and I-V curves of a metal/nanocomposite/metal (M/NC/M) sandwiches based on NC (Co40Fe40B20)x(LiNbO3)100-x synthesized on SiO2/Si substrates are investigated. Samples M/NC/M were obtained by the method of ion beam sputtering of a composite target which allows to form NC of different composition in the range x = 5–48 at. %. Electron microscopic analysis showed that the matrix consists of metal granules in an amorphous nonstoichiometric matrix. The granules have a size of d~2–3 nm and have a shape close to spherical with a slight elongation along the growth direction. The local chemical composition of NC films was studied by X-ray photoelectron spectroscopy. The structures demonstrate the effect of resistive switching with the maximum value Roff / Ron≈10, observed at the metal content is x ~ 13 at. %. The number of write/erase cycles was more than 10^4. Observed effect of resistive switching is explain by the oxygen vacancies action on the tunnel conductivity of the contacts of granules percolation chains with one of structure electrode separated from the NC by a strongly oxidized layer.