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Cutout of the H = 0 plane in reciprocal space for Fe(001) on Ag(001) and the different (001) iron oxides assuming bulk lattice parameters. The crystal truncation rods (CTRs) measured in this work are marked by dashed lines.
XPS spectra of the Fe 2p peak recorded after each annealing step. Inset: Ag 3d spectrum of the sample after oxidation at 400 °C.
X-ray reflectivity measurements for the film after each preparation step.
(a) (00)-rod of the as deposited Fe(001)/Ag(001) film (red dots). A calculation using kinematic diffraction theory is shown as solid red line and shifted for better visibility. The (00)-rod after oxidation at is shown as blue circles. The Fe Bragg peak is vanished. (b) Decreasing Fe Bragg peak intensity during oxidation process.
(a) L-scans along the (00)-rod of the film after annealing at in UHV and in oxygen, respectively. The dashed lines correspond to Bragg peak positions for bulk Fe3O4 and bulk FeO. (b) L-scans of the (0 1/2)-rod only existing for γ-Fe2O3(001) or Fe3O4(001). The positions of the peaks expected for these oxides are marked by dashed lines.
(a) Hysteresis loops for 6° off magnetic hard and easy axes. The linear part of the MOKE is shown and the resulting coercive fields are marked by arrows. (b) Polar plot of the coercive field of the oxide film for different azimuthal sample rotation angles α. Data points for magnetic hard and easy axes are marked by red and blue dots, respectively.
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