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The switching of the magnetic easy axis by exposing ultrathin Co/Cu(110) films to CO gas and the subsequent reversing of this effect upon the deposition of submonolayers of Cu has been investigated, using in situ magneto-optic Kerr effect. The easy axis switching is attributed to the competition between the cubic anisotropy K 1 and the effective uniaxial anisotropy K eff ...
The effect of non-magnetic overlayers on the magnetic anisotropy behaviour of FCC Co(1 1 0) epitaxial films are discussed. It is shown that uniaxial magnetic anisotropies are the generic signature of the presence of symmetry breaking atomic and nm scale structures, e.g. steps, clusters, islands in ultrathin films. Surprisingly, strong changes in anisotropy behaviour occur with sub-monolayer depositions...
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