Influence of the small magnetic contributions to susceptibility on the angular dependencies of X-ray resonant magnetic reflectivityстатья
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Аннотация:The Xray resonant magnetic scattering (XRMS) method allows for the determination of optical constants including magnetic corrections, which are significant near the atomic Xray absorption edges, by the shift of the Bragg angle of the reflection from periodic multilayers. Recently, Valvidares et al. [Phys. Rev. B 78, 064406 (2008)] revealed significant differences in the shape of “magnetic” Bragg reflection peaks from a [Co73Si27(50 Å)/Si(30 Å)]10 film for two opposite states of antiferromagnetic interlayer ordering. Valvidares et al. assumed that these features can be explained by the presence of the reflectioninduced magnetic resonance correction. We have demonstrated that such corrections in the case of antiferromagnetic structures do not lead to a shift of the Bragg peak, but the shape of magnetic peaks is explained by the interference of the magnetic and nonmagnetic reflection amplitudes.