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Growth of a Fe/native oxide/Fe trilayer incorporating two probe layers on a W substrate. The blurring of the LEED pattern in (b) and (c) documents the formation of a disordered oxide layer. The timespectrum of (a) and (b) shows that the magnetic moment of the probe layer is parallel to the (110) direction. In (c) the timespectrum indicates that the magnetic moment of at least one of the two probe layers is not collinear with the photon wavevector .
Upper panel: X-ray nuclear (integrated delayed intensity) reflectivity recorded near the critical angle on the Fe/Fe-oxide/Fe trilayer. The dashed and dotted lines are the square of the calculated field intensity at the position of the top and bottom probe layers respectively. The solid line is the sum of both. Lower panel: Calculated wavefield intensity in the depth of the sample for the selected angles of incidence.
Set of timespectra recorded at three different angles of incidence for two different sample orientations. The red lines are consistent fits to determine unambiguously the magnetic structure of each probe layer. The right hand pictogram is the magnetic structure of the two probe layers (red arrow), as derived from the timespectra analysis.
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