Dresden 2006 – scientific programme

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DS: Dünne Schichten

DS 15: Thin magnetic films

DS 15.5: Talk

Wednesday, March 29, 2006, 17:00–17:15, GER 38

Isolated cadmium atoms in different environments on nickel surfaces — •Wolf-Dietrich Zeitz — Hahn-Meitner-Institut, Glienicker Strasse 100, 14109 Berlin

The electronic configurations of isolated Cd atoms on Ni surfaces were measured by the PAC tracer method. The Cd impurities could be positioned at steps, kinks, in and at the surface layers of ferromagnetic nickel single crystals. The outstanding result of the experiments is a dependence of the magnetic hyperfine field on the coordination number.

The presentation at this conference shall give a review on the experimetal findings and the interpretation which includes band structure calculations.

According to the calcutations, the measured electric gradients are interpreted by the distribution of electrons among different p-sublevels, while the magnetic hyperfine fields are explained from the polarisation in the local density of s-states in the conduction band.

In addition, the calculations give predictions for other sp-elements on surfaces of ferromagnets and thus present a generalised view of this topic.