1 resultado para TR-PEEM, XMCD, ultraschnelle Magnetisierungsvorgänge, Permalloy, transiente raumzeitliche Domänenmuster, Spinwellenmode, Streufelder
em Aston University Research Archive
Filtro por publicador
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Resumo:
Ultrathin Fe oxide films of various thicknesses prepared by post-growth oxidation on GaAs(100) surface have been investigated with X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and X-ray magnetic circular dichroism (XMCD). The XPS confirms that the surfaces of the oxide are Fe3O4 rather than Fe2O3. XAS and XMCD measurements indicate the presence of insulating Fe divalent oxide phases (FeO) beneath the surface Fe3O4 layer with the sample thickness above 4 nm. This FeO might act as a barrier for the spin injection into the GaAs.