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A06 - Nanometer-resolved ultrafast spin and electron dynamics at magnetic surfaces

Principal Investigator:

In this project the spin and magnetization dynamics of ferromagnetic and antiferromagnetic thin films will be studied on the nanometer length scale. Femtosecond time-resolved photoemission electron microscopy (tr-PEEM) with back-side pumping, front-side probing geometry will be applied in combination with time-resolved two-photon photoelectron spectroscopy (tr-2PPE). With independently tunable pump and probe laser pulse wavelengths, we will address the spatial distribution of spin dynamics driven by a transient electronic structure. This transient electronic structure under investigation will be excited indirectly by a spin current or directly by optical pulses. These excitations will be investigated by tr-2PPE and spatially tailored by plasmonic nanostructures in the tr-PEEM experiments. A specific goal is to image domain switching and domain wall motion in ferromagnetic and antiferromagnetic thin films on the nanometer scale upon femtosecond spin and optical excitations.