Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.45: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Time-resolved soft X-ray microscopy of magnetic nanostructures at the P04 beamline of PETRA III — •Philipp Wessels1, Johannes Ewald2, Marek Wieland1, Thomas Nisius2, Gennaro Abbati2, Stefan Baumbach2, Jens Viefhaus3, Thomas Wilhein2, and Markus Drescher1 — 1Institute for Experimental Physics, University of Hamburg, Germany — 2Institute for X-Optics, RheinAhrCampus Remagen, Germany — 3Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
We present first time-resolved measurements obtained with a new transmission microscope at the soft X-ray beamline P04 of the high brilliance synchrotron radiation source PETRA III.
A nanostructured magnetic permalloy (Ni80Fe20) sample can be excited either by making use of a mobile synchronized femtosecond laser system or by a 250 ps electric current pulse via a coplanar waveguide. The full-field soft X-ray microscope successively probes the time evolution of the magnetization in the sample via XMCD spectromicroscopy in a pump-probe scheme. Static and transient magnetic fields are available in the sample plane by permanent magnets and coils to reset the system and to provide external offset fields.
The microscope generates a flat-top illumination field of 20 µm diameter by using a grating condenser and the sample plane is directly imaged by a micro zone plate with < 65 nm resolution onto a 2D gateable X-ray detector to select one particular bunch in the storage ring that probes the dynamic information.