Berlin 2005 – wissenschaftliches Programm

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MA: Magnetismus

MA 22: Magnetische dünne Schichten IV

MA 22.8: Vortrag

Dienstag, 8. März 2005, 12:15–12:30, TU H1012

MODIFICATION OF THE SPIN DENSITY WAVE OF CR IN FE/CR MULTILAYERS BY INSERTION OF SN — •Dieter Lott¹, Danica Solina¹, Mohamed Almokhtar², Ko Mibu³, Jörg Dudek⁴, Wolfgang Schmidt⁵ und Andreas Schreyer¹ — ¹GKSS Research Center, Max Planck Str.1, D-21502 Geesthacht, Germany — ²Physics Department, Assiut University, Assiut, Egypt — ³Research Center for Low Temperature and Materials Sciences, Kyoto University, Uji, Kyoto, 611-011, Japan — ⁴Institut für Experimentalphysik/Festkörperphysik, University Bochum, D-44780 Bochum, Germany — ⁵Institut Laue Langevin, 38042 Grenoble, France

Recently, the SDW behavior of Cr in Fe/Cr/Sn/Cr multilayers was studied by Moessbauer spectroscopy [1]. The monolayer (ML) of Sn inserted into the Cr layers serves as a Moessbauer probe permitting the study of the magnetic local environment around Sn providing details about of the magnetic stucture of Cr. In this work, complimentary neutron diffraction studies were carried out on a set of Fe/Cr(t) and Fe/Cr(t/2)/Sn(2Å)/Cr(t/2) multilayers with t=80Åand t=160Å. Here, the magnetic order of the Cr layers was examined, systematically comparing the systems with and without Sn inserted in the Cr layers. The multilayers with Sn show drastic changes in the diffraction pattern for both Cr thicknesses. Using polarized neutron diffraction and reflectivity combined with the information obtained by SQUID measurements enable us to connect the spin orientation of the Cr and Fe moments to the changes in the SDW behavior. [1] M. Almokhtar et al., Phys. Rev. B 66, 134401 (2002)