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用磁控溅射法分两种顺序制备了系列厚度的[CoPt/Ag]n 纳米多层膜,600℃真空退火后, 进行了磁性测量和微结构分析. 研究表明, 退火后两种顺序制备的[CoPt/Ag]n 多层膜有着不同的微结构和磁性能, 且膜厚越小差别越显著.先沉积 Ag 层的[Ag/CoPt]n多层膜, 退火后更易于形成高有序化度的 L10-CoPt 相,并具有较高的矫顽力. Ag 作底层影响了 CoPt 无序立方向有序四方的转化是引起这种差别的可能原因. 剩磁曲线分析表明, Ag 的掺杂有利于降低 CoPt 晶粒间的磁交换耦合作用.
A series of [CoPt / Ag] n multilayered films with different thickness were prepared by magnetron sputtering in sequence, and the magnetic measurements and microstructures were performed after annealing in vacuum at 600 ℃ .The results show that after annealing, Of the [CoPt / Ag] n multilayers have different microstructures and magnetic properties, and the smaller the film thickness, the more significant the difference is that the [Ag / CoPt] n multilayers deposited on the Ag layer are easier to form after annealing The order of degree of L10-CoPt phase, and has a high coercive force.Ag as the bottom layer affected the order of disorder transformation of CoPt ordered four-way conversion is the possible cause of this difference.Magnetic curve analysis shows that the Ag Doping helps reduce the magnetic exchange coupling between CoPt grains.