November 07, 2022
Minneapolis, United States
Investigation of Sub Nanosecond Fluctuations on Amorphous FeGe Near a Magnetic Phase Transition
Competition between the symmetric and antisymmetric exchange interactions can give rise to non-trivial magnetic spin textures that are both physically interesting and technologically promising. Here, I present results from a recent experiment conducted at LCLS that probed the magnetic fluctuations of an amorphous FeGe film. In this experiment, the magnetic phase transition between a helical and a paramagnetic state was investigated by means of X-ray photon fluctuation spectroscopy. By analyzing the statistical distribution of photon arrival events, sub-nanosecond timescales could be probed. This work provides both insight into the stabilization of magnetic spin textures as well as a template for future sub-nanosecond experiments that are now available due to X-ray Free Electron Lasers.