Berlin 2008 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Magnetic Particles / Clusters II
MA 22.3: Vortrag
Mittwoch, 27. Februar 2008, 14:30–14:45, H 1028
Tuning the magnetic properties of deposited transition metal clusters by decoration — •Jan Minar1, S. Bornemann1, H. Ebert1, J.B. Staunton2, S. Rusponi3, and H. Brunne3 — 1Dep. Chemie, LMU, Butenandtstr. 5-13, 81377 M\"unchen, Germany — 2Department of Physics, University of Warwick, UK — 3EPF Lausanne, Switzerland
Using the fully relativistic version of the KKR-method for electronic structure calculations within local spin density functional theory (LSDA) the magnetic properties of Fe, Co and Ni clusters deposited on the Pt(111) surface have been investigated. Of central interest are the role of spin-orbit coupling as it influences the spontaneous formation and orientation of magnetic moments and gives rise amongst others to the occurrence of orbital magnetic moments, the magnetic anisotropy energy (MAE) and magnetic circular dichroism in X-ray absorption (XMCD). Our systematic investigations of different clusters and nanostructures aim to reveal the mutual relationship among their spin-orbit induced properties. In addition they show how their various magnetic properties depend on the structural properties and chemical composition of the studied system. For large two-dimensional clusters we focussed especially on the dependency of the MAE on decoration with another transition metal. Our results are in qualitative agreement with recent experimental findings. We resolved the MAE contributions for inequivalent cluster atoms and will discuss the effect of the induced MAE within the Pt substrate.