Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 10: Magnetic Imaging
MA 10.2: Vortrag
Montag, 23. März 2009, 17:30–17:45, HSZ 403
Soft x-ray holograpic microscopy — •Daniel Stickler1, Robert Frömter1, Holger Stillrich1, Christian Menk1, Carsten Tieg2, Simone Streit-Nierobisch3, Christian Gutt3, Lorenz-M. Stadler3, Olaf Leupold3, Micheal Sprung3, Gerhard Grübel3, and Hans Peter Oepen1 — 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11 A, 20355 Hamburg, Germany — 2European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France — 3Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany
Soft x-ray holography has proven as a powerful technique for imaging of magnetic domain structures [1]. A disadvantage of the technique is the fact that the signal to noise ratio limits the field of view for a given spatial resolution which is basically determined by the size of the reference hole. To overcome this obstacle we have separated the sample from the optical elements. The sample, which is prepared on one membrane, is positioned with nanometer precision with respect to the imaging and reference holes which are fabricated on a second membrane. These are reusable. The concept has been realized at the ID08 beamline of the ESRF. In our talk we will demonstrate that large structures can be imaged by sequential measuring of small segments. The variation of the domain structure along a wedge proves the applicability of the technique for a new class of experiments. It has to be pointed out that this solution can easily applied to imaging of biological specimen as size and positioning are no longer an issue.
[1] Eisebitt et al. - Nature 432, 885 (2004)