*Register * or Login: Password: Quick Search: within *2 of 2* *Superlattices and Microstructures* Volume 37, Issue 2 , February 2005, Pages 99-106 This Document *SummaryPlus* Full Text + Links PDF (178 K) Actions Cited By Save as Citation Alert E-mail Article Export Citation doi:10.1016/j.spmi.2004.07.004 Copyright © 2004 Elsevier Ltd All rights reserved. X-ray resonant magnetic scattering by Fe/Cr superlattices * * **A. Nefedov* <#hit2>^ <#cor1>^, ^ , J. Grabis, A. Bergmann, F. Radu and H. Zabel * Ruhr-Universität Bochum, Universitätstrasse 150, D-44780 Bochum, Germany Received 3 June 2004; revised 21 July 2004; accepted 21 July 2004. Available online 15 September 2004. 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. *Keywords: *X-ray resonant magnetic scattering; Antiferromagnetically coupled superlattice *PACS: *75.25.+z; 07.85.Qe; 75.70.Cn; 61.10.Kw Article Outline Acknowledgements References (9K) Fig. 1. Specular (closed symbols) and longitudinal diffuse scans (0.4^ offset) (open symbols) taken at the Fe /L/_3 edge with circularly polarized radiation for an AF coupled superlattice with 20 repeats of [Cr(8 )/Fe(11.4 )] deposited on a Cr(240 )/MgO(001) buffer–substrate system. (9K) Fig. 2. The hysteresis loop measured at the position of the first-order Bragg peak with circularly polarized radiation (open and closed symbols). The line shows the part of the hysteresis loop measured by SQUID magnetometry (right /y/ -axis), where /M/_/S/ is the saturation magnetization at /H/_/S/ =30 kOe. The bar indicates the magnitude of the typical error. (8K) Fig. 3. The half-order peak intensity (specular and off-specular) in the remanent state and at the magnetic field (/H/=±2.7 kOe) applied in the scattering plane along the sample surface (circularly polarized radiation). (7K) Fig. 4. 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