Abstract
AbstractExperimental observations on the anomalous transmission of X‐rays through a single crystal of Fe + 3 wt % Si having a regular domain arrangement are reviewed and discussed. The contrast lines present in these transmission photographs are interpreted as X‐ray interference fringes which are shown to run perpendicular to the domain boundaries seen on the crystal by the Bitter technique. From the presence of fringes in both the anomalously diffracted and transmitted beams it is inferred that the dynamical theory of X‐ray diffraction is necessary to explain this effect. The orientation of these fringes and their appearance and disappearance as a function of the diffracting plane are derived using the dynamical theory of diffraction in a medium containing magnetic domain boundaries in the path of the X‐ray beam. The observed dependence of fringe spacing on X‐ray wavelength is also quantitatively explained by this calculation.
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