Picosecond optical control of the magnetization in exchange biased NiFe/FeMn bilayers
Picosecond optical control of the magnetization in exchange biased NiFe/FeMn bilayers
复制标题
交换偏置 NiFe/FeMn 双层磁化强度的皮秒光学控制
DOI：
10.1063/1.1652416
复制
发表时间：
2004
影响因子：
3.2
通讯作者：
J. Fassbender
中科院分区：
文献类型：
--
作者：
M. Weber;H. Nembach;J. Fassbender
9 ps 短激光激励用于在皮秒时间尺度上光学控制 NiFe/FeMn 交换偏置系统的磁化强度。由于激光激发，铁磁层和反铁磁层之间界面上的交换耦合减少。在前 20 ps 内，观察到交换偏置场快速减小至其初始值的约 50%。快速光学脱钉之后是偏置场的较慢恢复。该弛豫时间约为 170 ps。
A 9 ps short laser excitation is used to optically control the magnetization of a NiFe/FeMn exchange bias system on the picosecond timescale. Due to the laser excitation, the exchange coupling across the interface between the ferromagnetic and the antiferromagnetic layer is reduced. Within the first 20 ps, a fast reduction of the exchange bias field to about 50% of its initial value is observed. The fast optical unpinning is followed by a slower recovery of the bias field. This relaxation time is on the order of 170 ps.