3 research outputs found
Structural and Magnetoresistive Properties of Nanometric Films Based on Iron and Chromium Oxides on the Si Substrate
Abstract Ultraviolet photons of KrF laser (248Β nm) was used for the synthesis of nanometric films based on iron and chromium oxides (Fe2O3βββX (0ββ€βxββ€β1) and Cr3βββX O3βββY (0ββ€βxββ€β2; 0ββ€βyββ€β2)) with variable thickness, stoichiometry, and electrical properties. Film deposition was carried out on the silicon substrate Siββat the substrateβs temperature T Sβ=β293 K. X-ray diffraction and X-ray reflectometry analysis were used for the obtained structure characterization. Such a combined investigation reveals the composition and texture for samples investigated and provides useful information about layer thickness and roughness. Fe2O3βββX (0ββ€βxββ€β1) nanometric films demonstrate the negative magnetoresistance in magnetic fields up 7Β kOe. At the same time, for hybrid systems of the alternate layers Fe2O3βββX (0ββ€βxββ€β1)/Cr3βββX O3βββY (0ββ€βxββ€β2; 0ββ€βyββ€β2), the positive magnetoresistance as well as the magnetic hysteresis and magnetoresistivity switching effect in the low magnetic fields were observed