Room-temperature preparation of crystallized Ba_1-xSr_xWO₄ solid-solution films by an electrochemical method

Films of a complete series of solid-solution oxides, Ba_1-xSr_xWO₄ (0 ≦ X ≦ 1), have been prepared on tungsten substrates in an electrolytic solution containing Ba²⁺ and Sr²⁺ ions by an electrochemical method at room temperature (25°C). The composition X could easily be controlled by the concentrations of Ba and Sr species in the starting solutions. X-ray diffraction and X-ray photoelectron spectroscopy analyses showed that a complete series of well-crystallized solid-solution oxides was formed even at room temperature.