Regensburg 2002 – wissenschaftliches Programm
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MA: Magnetismus
MA 10: Poster : Dünne Schichten(1-21),Spinabh.Transp.(22-39),Exch.Bias(40-51),Spindyn.(52-55),Mikromag.(56-66),Partikel(67-74),Abb.Verf.(75-77),Oberfl.+Spinelektr.+Elektr.Theo+Mikromag(75-87),PÜ+Aniso+Werkst/Leg.(88-103),Mol.Mag.+N-dim+Messm.+Postdead(104-111
MA 10.58: Poster
Dienstag, 12. März 2002, 15:00–19:00, Bereich A
Spontaneously formed magnetic nanowires — •Andreas Westphalen und Katharina Theis-Bröhl — Institut für Experimentalphysik / Festkörperphysik, Ruhr-Universität, 44780 Bochum
The formation of nanometer-scale periodic structures on crystal surfaces
has become a subject of interest in recent experimental and theoretical
studies. We used facetted crystal surfaces as substrates for the
preparation of magnetic nanowires with a periodicity of several hundreds of
nm. By annealing m-plane sapphire in air, the surface facets into a regular
pattern of roof-like structures with an height of several tenth of
nm1,2 By evaporating iron from an effusion cell within an MBE-system
under a very low angle to the substrate, only one of the both facet
surfaces of the roof-like structure was covered by the deposit, as
previously shown by Huth et al.1 for Fe and Nb. This procedure leads to
a periodically ordered nanowire film structure. AFM measurements on the
facetted surfaces as well as on the deposited films are presented and
compared to x-ray studies. The magnetic properties of the structured films
were measured by specular vector-MOKE.
We acknowledge founding by DFG, SFB 491.
1 M. Huth, K. Ritler, J. Oster, H. Dosch, H. Adrian, PRB, in press.
2 J.R. Heffelfinger, M.W. Beach, C.B. Carter, Surface Sci. 343, L1161
(1995).