Spin polarized surface states of cobalt nanoislands on Cu(111)

The electronic structure of thin Co nanoislands on Cu(111) has been investigated by scanning tunneling spectroscopy at low temperature. Two surface related electronic states are found. An energetically localized state in the spectrum at 0.31 eV below the Fermi level (EF) and a mainly unoccupied dispersive state, giving rise to quantum interference patterns of standing electron waves on the Co surface. Ab initio calculations reveal that both electronic states are spin-polarized, originating from d(3z2-r2)-minority and sp-majority bands, respectively.</p

Calculated magnetic properties of an Fe1-xNix monolayer on Cu(001)

We present a detailed investigation of the magnetic properties of a single monolayer of Fe-Ni alloy film on Cu(001) substrate by means of the spin-polarized linear muffin-tin orbitals Green's-function technique and the Korringa-Kohn-Rostoker Green's funct</p

Colossal magnetic anisotropy of monatomic free and deposited platinum nanowires

Whenever a nanosystem such as an adatom, a cluster or a nanowire spontaneously magnetizes, a crucial parameter is its magnetic anisotropy, the intrinsic preference of magnetization to lie along an easy axis(1). Anisotropy is important in nanosystems because it helps reduce the magnitude of thermal ( superparamagnetic) fluctuations, it can modify the flow of current, and it can induce new phenomena, such as the quantum tunnelling of magnetization(2). We discuss here, on the basis of density functional calculations, the novel and unconventional feature of colossal magnetic anisotropy-the strict impossibility of magnetization to rotate from the parallel to the orthogonal direction-which, owing to a quantum mechanical selection rule, the recently predicted Pt nanowire magnetism should exhibit. Model calculations suggest that the colossal magnetic anisotropy of a Pt chain should persist after weak adsorption on an inert substrate or surface step