论文标题
通过在相邻层中加速激光诱导的铁磁性膜的灭绝铁磁膜
Accelerating the laser-induced demagnetization of a ferromagnetic film by antiferromagnetic order in an adjacent layer
论文作者
论文摘要
我们研究了激光脉冲激发后NI/NIMN和CO/NIMN铁磁/抗铁磁双层系统的超快消灭。我们在时间分辨泵中使用磁性圆形二色性探测Ni和CO的铁磁顺序 - 探针谐振X射线反射率。调整NIMN层的抗磁磁有序温度的样品温度允许研究由后者的磁序引起的效果。 NIMN中的抗铁磁顺序的存在加速了铁磁层的灭绝，这归因于双向激光诱导的铁磁和抗磁磁性层之间的超级潜水旋转电流。
We study the ultrafast demagnetization of Ni/NiMn and Co/NiMn ferromagnetic/antiferromagnetic bilayer systems after excitation by a laser pulse. We probe the ferromagnetic order of Ni and Co using magnetic circular dichroism in time-resolved pump--probe resonant X-ray reflectivity. Tuning the sample temperature across the antiferromagnetic ordering temperature of the NiMn layer allows to investigate effects induced by the magnetic order of the latter. The presence of antiferromagnetic order in NiMn speeds up the demagnetization of the ferromagnetic layer, which is attributed to bidirectional laser-induced superdiffusive spin currents between the ferromagnetic and the antiferromagnetic layer.
