..................................................6 分子束外延方法................................................................................6 机械合金化热压烧结制备法............................................................7 本课题研究意义及内容.............................................................................10 研究目的和意义..............................................................................10 研究内容..........................................................................................11 第二章样品制备......................................................................................................12 仪器设备.....................................................................................................12 行星式球磨机..................................................................................12