X-ray resonant magnetic scattering by Fe/Cr superlattices |
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Institution: | 1. Department of Atomic Physics, Budapest University of Technology and Economics, Budafokiút 8, 1111 Budapest, Hungary;2. Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Konkoly-Thege Miklós str. 29–33., 1121 Budapest, Hungary;3. Uzhhorod National University, Zankoveckoyi, 89a str., 88015, Uzhhorod, Ukraine |
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Abstract: | We have studied the structural and magnetic properties of an antiferromagnetically (AF) coupled Fe/Cr superlattice by means of soft x-ray resonant magnetic scattering. Strong and purely magnetic Bragg peaks are observed at the half-order positions in reciprocal space parallel to the 001] growth direction and in between the structural Bragg reflections from the superlattice periodicity. The magnetic hysteresis loops measured at the first-order and at the half-order Bragg peaks clearly demonstrate the strong AF coupling of the Fe/Cr multilayer. Transverse scans and off-specular reflectivity measurements confirm an AF domain structure of the superlattice in remanence with large perpendicular correlation. In addition, the transverse scan of the half-order Bragg peak exhibits a Lorentzian line shape at zero field, which diminishes in higher fields, indicative of a remanent multidomain state approaching a single-domain state towards saturation. |
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