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MA: Fachverband Magnetismus

MA 11: Spindependent Transportphenomena II

MA 11.7: Talk

Monday, February 25, 2008, 16:45–17:00, H 0112

Electronic structure and its influence on the magnetic properties of uranium ternaries UTM — •Malgorzata Samsel-Czekala — Leibniz-Institut für Festkörper- und Werkstoffforschung, IFW Dresden, PF 270116, D-01171 Dresden, Germany — Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland

The electronic structure of uranium UTM compounds, where (T = Ru, Ir; M=Al, Ga, Si), is reviewed. The obtained results of band-structure calculations, employing the modern full-potential local-orbital (FPLO) minimum basis code [1], are compared with experimental data of x-ray photoelectron spectroscopy (XPS) and transport and magnetic properties, obtained for single-crystalline samples [2,3]. Good agreement is achieved between theoretical and experimental results, showing a high degree of 5f electrons delocalization in these compounds. Such phenomena as spin fluctuation or Kondo-like behavior have been revealed in the experiments.

[1] FPLO-5.00-18 (improved version of the original FPLO code by K. Koepernik and H. Eschrig, Phys. Rev. B 59, 1743 (1999)]; http://www.FPLO.de;

[2] M. Samsel-Czekała, E. Talik, R. Troć, J. Stepien-Damm, submitted to Phys. Rev. B.

[3] M. Samsel-Czekała, E. Talik, R. Troć, to be published.