Keywords Manganese perovskite;Magnetron sputtering;Electron beam evaporation;Mechanical ball milling;Sintering;Metal-to-insulator transition;Colossal magnetoresistance;

• 锰基钙钛矿巨磁阻材料;磁控溅射法;电子束蒸发法;球磨法;烧结;金属-半导体转变;庞磁阻效应;