Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba_1−xCa_xZrO₃ over the entire Ca composition range

Abstract

Formation of solid solutions was examined in a wide miscibility gap system of Ba_1−xCa_xZrO₃ by preparing film samples having amorphous structures with the help of rf magnetron sputtering and then annealing the amorphous film samples at a moderate temperature condition. Ba_1−xCa_xZrO₃ solid solutions were successfully formed as monophasic products over the entire Ca composition range, indicating the usefulness of the method for the formation of solid solutions in perovskite-type oxides, and Ca composition dependence of the permittivity was revealed in the solid-solution system.