Ultrafast Optically Induced Ferromagnetic State in an Elemental Antiferromagnet

Evangelos Golias, Ivar Kumberg, Ismet Gelen, Sangeeta Thakur, Jendrik Gördes, Rahil Hosseinifar, Quentin Guillet, S. Sharma, C. Schüßler-Langeheine, Wolfgang Kuch, Universitätsbibliothek Der FU Berlin
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
more » ... n unoccupied states caused by the Co interface for the emergence of this transient ferromagnetic state.
doi:10.17169/refubium-29905 fatcat:lo7nk4scxre5zmjvtr37uzxrzi