M.Kisielewski, A.Maziewski, Z.Kurant, M.Tekielak,
Institute of Experimental Physics, University of Bialystok, Lipowa 41, 15-424,
Bialystok, Poland
A.Wawro, L.T.Baczewski
Institute of Physics Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Wa
rsaw, Poland.
Ultrahigh vacuum molecular beam epitaxy system was used for preparation of foll
owing samples polished sapphire/Mo(20nm)/Au(20nm)/ultrathin Co wedge (with
thickness 0<dCo<2nm)/silver wedge (0<dAg<6nm) perpendicular to cobalt one/Au(8n
m) coverage. Complementary millimeter and micrometer scales magnetooptical
studies based on polar Kerr effect were performed. A few silver monolayers have
a substantial effect on magnetic anisotropy, the coercivity field, magnetic do
main
structure and Kerr rotation. The silver overlayer thickness-driven magnetic reo
rientation from easy axis to easy plane generates new type of magnetic wall for
1.3<dCo<1.8nm. A noble metals overlayer structure tuning of magnetic properties
of ultrathin film gives new possibilities for magnetic patterning important fo
r new
research and practical application.

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1. Magnetic Nanostructures
2. Magnetic anisotropy of Co films annealed by laser pulses
3. Magnetic properties of (FeAu)_n alloys
4. Morphological and magnetic properties of cobalt nanostructures fabricated by focused ion beam
5. Magnetic anisotropy of ultrathin cobalt in Au/Co/Si/Au structures with variable Si thickness.
6. Interlayer coupling in Ni-Fe/Au/Co/Au multilayers
7. Modification of magnetic properties of ultrathin cobalt layers by an overlayer structure