DiProI Research

Magnetic and Resonant CDI

First proof of principle of resonant magnetic scattering performed at the DiProI beamline: the magnetic domain scattering is more intense at the Co M_2,3 resonance.

Absorption at the Co M2,3-edge. Blue dots represent wavelengths at which magnetic scattering patterns have been measured.

The proof-of-principle resonant CDI experiments were performed with Co/Pt multilayer samples, exploring the strong resonant enhancement of magnetic scattering at the Co M2,3-edge. For these experiments we installed and commissioned a direct detection CCD system (X-CAM) provided by our partner from CFEL-DESY. Tuning the Fermi-FEL wavelength λ to the Co M2,3 absorption edge (20.8 nm), the speckle pattern created by the photons scattered from the magnetic domains gains intensity. This ring structure is typical for a labyrinth-type domain organization and contains information about the average domain size and period of the magnetic structure. The extraordinary opportunities of circularly polarized Fermi-FEL pulses are in using single-shot resonant magnetic scattering in holography approach that will allow easier access to magnetic dynamic experiments.

Direct detection CCD system Modular CCD: the main unscattered beam is let through the gap between two chips.