Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)
O 27.99: Poster
Dienstag, 24. März 2009, 18:30–21:00, P2
Graphene-protected iron layer on Ni(111) — •Yuriy Dedkov1, Mikhail Fonin2, Ulrich Rüdiger2, and Clemens Laubschat3 — 1FHI Berlin — 2Uni Konstanz — 3TU Dresden
Magnetic thin films with out-of-plane (or perpendicular) magnetic anisotropy play an important role in nanotechnology. Such systems can be used as perpendicular recording media which are predicted to allow information storage densities of up to 1 Tbit/in.2 a quadrupling of today’s highest areal densities. Along with the widely used materials with out-of-plane magnetic anisotropy such as CoPt or FePt alloys, face-centered cubic (fcc) Fe thin films also showing perpendicular magnetic anisotropy have recently attracted considerable interest as possible candidates for applications in novel magnetic data storage devices. Here Fe which originally has body centered cubic (bcc) structure can be stabilized in γ phase (fcc) at room temperature in thin epitaxial films grown on suitable fcc substrates. Here we report a photoemission study of the Fe intercalation underneath a graphene layer on Ni(111). The process of intercalation was monitored by means of x-ray photoemission of corresponding core levels as well as ultraviolet photoemission of the graphene-derived π states in the valence band. Thin fcc Fe layers (2-5 ML thickness) at the interface between a graphene capping layer and Ni(111) form epitaxial films passivated from the reactive environment.