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Magnetic domains in epitaxial nanomagnets with uniaxial of fourfold crystal anisotropy

Pulwey, Ralph ; Zölfl, M ; Bayreuther, Günther ; Weiss, Dieter


In order to prepare submicron sized particles with strong magnetocrystalline anisotropies high quality epitaxial bcc-Fe films were grown on GaAs(110) and GaAs(001) by molecular beam epitaxy. Whereas Fe(110) on GaAs(110) is a model system with uniaxial in-plane anisotropy, Fe(001) on GaAs(001) has a strong fourfold anisotropy for films thicker than ${\approx}$5 nm. Various shapes like ...


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