Table-top resonant magnetic scattering with extreme ultraviolet light from high-order harmonic generation
Résumé
We demonstrate for the first time the applicability of high-order harmonic generation for probing magnetization properties with nanometer spatial resolution. High harmonics were generated by focusing an infrared femtosecond laser into a neon-filled gas cell. Using a high throughput monochromator, EUV pulses with a photon energy resonant to the magnetically dichroic Co M2, 3 absorption resonance were obtained. These were focused onto a CoPd alloy film and the magnetic scattering pattern was recorded in a transmission geometry. The scattering pattern induced by the magnetic domain structure consists of two well-defined bright spots revealing the presence of stripe domains of about 63 nm in width. With the inherent femtosecond time resolution given by high harmonics, this demonstration paves the way to investigate ultrafast magnetization dynamics with femtosecond time and nanometer spatial resolutions, in jitter-free experiment based on table-top EUV light sources.