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Schematic diagram of the measurement set-up and sample geometry (FZP: Fresnel zone plate; OSA: order sorting aperture; P is the light polarization and M the sample magnetization). The sample consists of a 20 nm thick Co film grown on a transparent luminescent substrate.
(a) Scanning x-ray absorption image of a 20 nm thick Co element array at 779.7 eV detected by photoluminescence. (b) Energy scans across the Co L edge for two positions in the sample as labeled in (a) taken with a focused x-ray beam, in diameter.
Scanning x-ray magnetic dichroism images of a Co square (779.7 eV). (b) X-ray magnetic circular dichroism energy scan for the Co L edge across the dashed line shown in (a); the signal integrated across the full and dashed box is shown in (c) for the MgO and Co regions of the sample, respectively.
X-ray induced optical luminescence of MgO as a function of photon energy. The luminescence signal is integrated over the whole visible range, set by the spectral sensitivity of the CCD detector.
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