论文标题
超快速的光学诱导的铁磁状态
Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet
论文作者
论文摘要
我们提供了CO/MN多层抗铁磁MN的超快光学诱导的铁磁比对的证据。我们使用X射线磁性圆形二色性在反射率中观察到泵脉冲在Mn L $ _3 $共振处的临时铁磁信号。效果的时间尺度与激发的持续时间相媲美，并发生在CO中的磁化之前。理论计算表明，由于这种瞬态铁磁状态出现的CO界面引起的MN未占用状态的数量不平衡。
We present evidence for an ultrafast optically induced ferromagnetic alignment of antiferromagnetic Mn in Co/Mn multilayers. We observe the transient ferromagnetic signal at the arrival of the pump pulse at the Mn L$_3$ resonance using x-ray magnetic circular dichroism in reflectivity. The timescale of the effect is comparable to the duration of the excitation and occurs before the magnetization in Co is quenched. Theoretical calculations point to the imbalanced population of Mn unoccupied states caused by the Co interface for the emergence of this transient ferromagnetic state.
