【摘要】 用磁控溅射法制备了GdFeCo DyFeCo交换耦合两层薄膜 ,对交换耦合两层薄膜变温磁化方向进行了研究 .结果表明读出层GdFeCo随温度上升从平面磁化转变成垂直磁化 ,转变过程中主要受饱和磁矩 (Ms)的影响 .在GdFeCo的补偿温度附近 ,读出层的磁化强度近于零 ,退磁场能减小 ,并在交换耦合的作用下 ,使读出层的磁化方向发生转变 ,制备的交换耦合两层薄膜具有中心孔磁超分辨效应更多还原

【Abstract】 The exchange-coupled films (GdFeCo/DyFeCo) were prepared by sputtering method. The magnetization transitions caused by temperature changes had heen investigated for the films.The results indicate that the magnetization direction of the readout layer changes from in-plane to perpendicular when temperature increases.The transition occurs mainly as a result of the changes in the saturation magnetization. When the temperature increase to near the compensation temperature, the saturation magnetization and the demagnetizing energy of the GdFeCo layer decrease, With the exchange-coupled interaction,the magnetization direction of the readout layer changes.The films can be used for center aperture detection type magnetically induced super resolution.更多还原