Regensburg 2002 – wissenschaftliches Programm
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O: Oberflächenphysik
O 16: Elektronische Struktur (III)
O 16.2: Vortrag
Dienstag, 12. März 2002, 11:30–11:45, H36
The influence of hydrogen adsorption on magnetic properties of Ni/Cu(100) surface — •Frantisek Maca1,2, Josef Redinger1, Raimund Podloucky1, and Peter Weinberger1 — 1Center for Computational Materials Science, Vienna University ofTechnology, Vienna, Austria — 2Institute of Physics, ASCR, Praha, Czech Republic
One way to monitor the surface magnetic anisotropy, in particular the critical thickness of the reorientation transition is the adsorption of a gas. A strong reduction of the critical thickness of the spin reorientation transition in Ni/Cu(001) has been observed when covered with hydrogen. We investigate the electronic as well as the geometrical structure of ultrathin Ni films on Cu(100) surface with 1 ML of hydrogen. The multilayer-relaxed structures have been investigated by the self-consistent all-electron full-potential linearized augmented plane-wave method. The relaxed geometries, as determined by total energy and atomic force calculations, show strong changes in the first and second interlayer nickel spacings. Furthermore, a large decrease of local magnetic moments in the top surface area has been found if the surface was covered by H. The microscopic origin of the relaxed structures is discussed.
This work was supported by RTN ’Computational Magnetoelectronics’ (Contract RTN1-1999-00145) of the European Commission.