Internal magnetic roughness in an iron–gadolinium multilayer

Abstract
The qz–dependent sign of the X–ray charge–magnetic interference diffuse scattering observed from an Fe–Gd multilayer is found to be due to rough internal magnetic interfaces in the Gd layers. The internal magnetic roughness is correlated with the charge roughness of the Fe–Gd interface. Born–approximation calculations using a fractal interface model show that the internal and Fe–Gd interfaces have similar magnetic roughness, as evidenced by the similar in–plane cut–off lengths of charge–magnetic height–height correlation functions.

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