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Imaging and quantifying perpendicular exchange biased systems by soft x-ray holography and spectroscopy
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Scheme of the experimental layout. (b) Sample-mask structure cross section showing the aperture for the field-of-view and one aperture for the reference beam. (c) Magnetic domain image of the perpendicular exchange biased system in its demagnetized state retrieved from the Fourier transform of the magnetic hologram acquired at the absorption edge. The two prominent gray scale values correspond to Co domains with opposite out-of-plane magnetization.

Image of FIG. 2.
FIG. 2.

Evolution of the magnetic domain structure of the FM layer along the hysteresis loop of the perpendicular exchnage biased [Pt/Co/IrMn system. The images were recorded at the edge. The magnetic field values are given in each image. Center: element selective hysteresis loop recorded in transmission at the edge. The exchange bias field and the nucleation fields (arrows) in both branches are indicated. The domain structure close to the nucleation point of the descending branch (c) is superimposed on the image recorded close to the nucleation field of the ascending branch (i). Note that the domain configuration is different in both branches.

Image of FIG. 3.
FIG. 3.

Normalized TEY-XMCD spectra of the perpendicular exchange biased [Pt/Co/IrMn system acquired at the (left) and (right) edges in negative (filled circles) and positive (empty squares) saturation. The solid line is the sum of the averaged XMCD spectra. The clear nonzero sum spectra at the edge is related to the amount of uncompensated AFM moments which are fixed (pinned) during FM reversal, and its positive sign indicates that they are oriented opposite to the field cooling direction.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Imaging and quantifying perpendicular exchange biased systems by soft x-ray holography and spectroscopy