Single laser pulse induced dynamic magnetization reversal mechanism of perpendicularly magnetized L10 FePt films
Single laser pulse induced dynamic magnetization reversal mechanism of perpendicularly magnetized L10 FePt films
复制标题
单激光脉冲诱导垂直磁化L10 FePt薄膜的动态磁化反转机制
DOI：
10.1063/1.3208062
复制
发表时间：
2009-09-01
影响因子：
3.2
通讯作者：
Zhou, S. M.
中科院分区：
文献类型：
--
作者：
Liu, X. D.;Xu, Z.;Zhou, S. M.
为了测量单脉冲激光光致动态磁化反转，交变磁场与飞秒激光脉冲同步，使得磁化状态在每个单激光脉冲之前被重置。对于垂直磁化的L10 FePt薄膜，动态磁化反转过程伴随着反向畴的成核和无势垒的瞬态畴壁运动在低磁场和随后的钉扎畴壁运动在开关场。开关场不随泵浦探测延迟时间而变化。
In order to measure photoinduced dynamic magnetization reversal by single laser pulse, alternating magnetic field is synchronized with the femtosecond laser pulse such that the magnetization state is reset before each single laser pulse. For perpendicularly magnetized L10 FePt films, the dynamic magnetization reversal process is accompanied by the nucleation of reversed domains and the barrierless transient domain wall motion at low magnetic fields and subsequent pinned domain wall motion at the switching field. The switching field does not change with the pump-probe delay time.