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- W2004222778 abstract "Structural and magnetic properties of $mathrm{Fe}(5mathrm{nm})/mathrm{Mn}{(t}_{mathrm{Mn}})/mathrm{Fe}(5mathrm{nm})$ ${(t}_{mathrm{Mn}}$ from 0.5 to 3.0 nm) sandwich structures, grown by molecular-beam epitaxy between 50 ifmmode^circelsetextdegreefi{}C and 150 ifmmode^circelsetextdegreefi{}C, were investigated using reflection high-energy electron diffraction (RHEED), x-ray-diffraction, Mossbauer spectroscopy, and magnetization measurements. Epitaxial bct-Mn structures only form for ${t}_{mathrm{Mn}}<1mathrm{nm},$ independently of the growth temperature. Room-temperature conversion electron Mossbauer spectra are composed of two magnetic components with in-plane magnetic moments. The first subspectrum has hyperfine parameters close to ensuremath{alpha}-Fe and is therefore associated with Fe atoms far from the interface regions. The second component, fitted with a hyperfine field (hf) distribution, has an isomer-shift value similar to ensuremath{alpha}-Fe and a maximum in the distribution curve at about 31 T. This subspectrum is related to the Fe atoms close to the Mn layer (interface regions). Low-field components in the hf distribution curves indicate the presence of Fe atoms or/and Fe clusters in the Mn spacers. An Fe-Mn alloy was observed for the samples grown for temperatures higher than or equal to 50 ifmmode^circelsetextdegreefi{}C and where the RHEED patterns show the presence of the ensuremath{alpha}-Mn phase. Magnetization data show that the Fe layers are ferromagnetically coupled for all trilayers prepared at substrate temperatures lower than 150 ifmmode^circelsetextdegreefi{}C. A noncollinear coupling was found for the trilayer with Mn thickness of 1 nm and grown at 150 ifmmode^circelsetextdegreefi{}C." @default.
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- W2004222778 date "2003-05-30" @default.
- W2004222778 modified "2023-10-17" @default.
- W2004222778 title "Interface and bulk properties of Fe/Mn sandwich structures" @default.
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- W2004222778 doi "https://doi.org/10.1103/physrevb.67.174424" @default.
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