Ultrafast generation and manipulation of ferromagnetic order

在这个项目中，我们将研究产生超短磁场脉冲的替代方法。这些方法是基于激光脉冲激励铁磁或反铁磁材料。在FeRh的情况下，超短激光脉冲通过快速加热材料越过反铁磁体/铁磁体转变温度来产生铁磁有序。在EuO的情况下，我们将使用能量低于铁磁性半导体带隙的圆偏振光来产生有效的内部场。在这两种情况下，我们打算研究超高速磁场产生和控制对沉积在驱动材料顶部的薄铁磁层的影响。

Within this project we will study alternative methods of generating ultra short magnetic field pulses. The approaches are based on laser pulse excitation of ferromagnetic or antiferromagnetic materials. In the case of FeRh the ultra short laser pulse is used to generate ferromagnetic order by rapidly heating the material across the antiferromagnet/ferromagnet transition temperature. In the case of EuO we will use circularly polarized light with energy below the band gap of the ferromagnetic semiconductor to generate an effective internal field. In both cases we intend to study the effect of ultra fast field generation and control on a thin ferromagnetic layer deposited on top of the ¿driving¿ material.