MAGNETISM IN ONE-DIMENSION - FE ON CU(111)

The magnetism and the morphology of one-dimensional Fr stripes on 3 Cu (III) vicinal surface with perpendicular magnetization are investigate d. Scanning tunneling microscopy shows that the Fe stripes have nanome ter width and are aligned in parallel along the [011] direction. From the magnetization curves it is inferred that the stripes exhibit a fer romagnetic behavior well below the nominal thickness of one monolayer. In contrast to two-dimensional films, the magnetization of the stripe s is not only temperature bur also time dependent. The dynamics of the stripes have been described by a micromagnetic Ising model with Glaub er dynamics. yielding an effective anisotropy constant K-1 of 0.65+/-0 .15 M J/m(3).