Münster 1999 – wissenschaftliches Programm
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AM: Magnetismus
AM 12: Elektronentheorie und Modelle geordneter Spinstrukturen
AM 12.2: Vortrag
Mittwoch, 24. März 1999, 14:45–15:00, F4
Interaction of the magnetic sublattices in UFe4Al8. — •L.M. Sandratskii and J. Kübler — Institut für Festkörperphysik, Technische Hochschule, 64289 Darmstadt
UFe4Al8 possesses [1] an interesting magnetic structure with the Fe moments almost orthogonal to the U moments. The U moments are parallel to each other and form a ferromagnetic sublattice. The Fe sublattice is close to collinear antiferromagnetic. There is, however, small canting of the Fe moments leading to the weak ferromagnetic component. We report first-principles calculation of the magnetic structure of UFe4Al8. Theoretical results are in good agreement with experiment and allow to reveal interactions responsible for the formation of this complex structure. Authors are grateful to L. Nordstöm for discussion of the crystal structure.
[1] J.A. Paixao et al, PRB 55 (1997) 14370.