Ultrafast Magnetism Probed with XUV MOKE

The use of ultrashort light pulses on the femtosecond timescale enables the manipulation of magnetic order at its fundamental temporal and spatial limits, giving rise to intriguing phenomena such as ultrafast demagnetization, optically induced superdiffusive spin transport, and all-optical magnetization switching.This talk presents recent advances in ultrafast magnetism enabled by extreme-ultraviolet (XUV) magneto-optical Kerr effect (MOKE) spectroscopy using high-harmonic generation sources, which provide element-specific access to femtosecond magnetization dynamics. The work clarifies how dielectric properties, multilayer interference, and interface effects shape XUV magneto-optical observables, establishing a framework for quantitative studies of femtomagnetism and all-optical switching phenomena.