Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 26: Poster Session

MM 26.13: Poster

Dienstag, 23. März 2010, 14:45–16:30, Poster C

The influence of d- and f-states on structure formation - amorphous alloys containing Rare Earths as model systems — •Martin Stiehler, Michael Pleul, and Peter Häussler — Chemnitz University of Technology, 09126 Chemnitz, Germany

Amorphous phases as precursors of the crystalline state are interesting for investigating fundamental structure forming processes and the related evolution of electronic transport. During the last years we were able to show that many different classes of alloys organize themselves under the influence of a resonance interaction between the global subsystems of the electrons and the static structure. Especially for binary Al-TM alloys (TM: the transition metals of the 4th period Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu) we reported recently on an electronic influence on phase stability driven by hybridization effects between the Al-p- and the TM-d-states, showing an interesting systematics depending on the number of unoccupied TM-d-states reflected in different properties. Currently we are about to extend the investigations to systems with transition metals of the 5th and 6th period. Embedded in this class of elements are the so-called Rare Earth metals (Sc, Y, La, and the Lanthanoids). These elements exhibit very similar chemical properties although some of them (the Lanthanoids) contain f-electrons. This provides the possibility of studying the influence of magnetic influences, provided by the localized f-states, on structure formation. In this contribution we report on preliminary results concerning the static structure, the electrical resistivity and the Hall effect of the binary systems Al-Y and Al-Ce.