基于微磁学模拟方法研究了椭圆纳米薄膜的超快反磁化特性.提出一种利用弱直流自旋极化电流辅助的场驱动进动反磁化新机制.新机制可以有效扩宽脉冲持续时间窗口,在宽的脉冲持续时间范围内可实现进动磁反转而无需精确控制;也可有效抑制磁反转后长时间磁振荡,缩短有效反磁化时间.时间窗口的扩宽和进动磁反转后磁振荡的衰减依赖于自旋极化电流密度.磁反转后的磁振荡由多种不同的自旋波模式构成,自旋转移力矩可以调制磁体有效阻尼,加速磁能量的耗散.
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