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Soft x-ray holographic microscopy
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic of the x-ray holographic microscopy setup. It consists of a holography mask support, a movable sample support, and a CCD detector. The membrane with the optical elements (mask), i.e., the object and reference holes, is fixed in the center of the x-ray beam from the synchrotron (left side of the drawing). A second membrane, which is the support for the sample, can be moved freely in a plane perpendicular to the beam.

Image of FIG. 2.
FIG. 2.

Sample geometry and reconstruction of a single magnetic domain image. A cut through the scattering plane is shown in (a). The sample is illuminated through the optics membrane [SEM micrograph (b)]. Image (c) is a cutout of the real part of the FFT reconstruction of the difference of two holograms acquired with opposite helicities at the cobalt absorption edge. The autocorrelation of the object hole is located at the lower right corner. The correlation of the object hole (center, marked red) and the two larger reference holes (yellow and green, magnified in the insets) with the small reference hole yield the magnetic domain patterns at the respective positions.

Image of FIG. 3.
FIG. 3.

Domain size evolution of a Co/Pt multilayer film covered by an iron wedge. Plot (a) gives the absorption profile (normalized photodiode current) at the Fe absorption edge when scanning over the Fe wedge. The absorption is used to calculate the local iron overlayer thickness (b). A contiguous series of XMCD holograms at the Co absorption edge has been acquired and reconstructed (c) at the indexed positions along the iron wedge. Image (d) has been measured at the Fe absorption edge at the very same position as the last Co image (#9).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Soft x-ray holographic microscopy