Journal of Applied Physics · 2008 · 46 citations · 6 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistryMetallic MaterialsSpectroscopyElectron Paramagnetic ResonanceMagnetic Properties Of SolidsMagnetism In SolidsMagnetism Of Inorganic CompoundsHeusler AlloysHyperfine InteractionsHyperfine SpectroscopyManganese-based IntermetallicsNuclear Magnetic Resonance StudiesResonance FrequenciesSpectral Line SplittingWyckoff Positions
Recent spin echo nuclear magnetic resonance (NMR) revealed that the half-metallic Co2Mn1−xFexSi Heusler alloys exhibit the L21 structure with random distribution of Mn and Fe on the 4b Wyckoff position. This random distribution is most prominent in the third coordination shell of the Mn55 nuclei, as this shell is the first magnetically active shell, leading to a line splitting in the Mn55 NMR spectra. A comparison, as presented in this paper, of all Mn55 NMR satellite lines shows that the resonance frequencies corresponding to the same number of Fe atoms in the third shell of Mn55 shift to slightly different resonance frequencies with increasing overall Fe content x. This shift is related to the constructive contribution of higher shells to the hyperfine field. These higher shells affect also the satellite linewidth, leading to a parabolic behavior with increasing Fe concentration x. This parabolic behavior is modified by the frequency spacing related to the replacement of Mn by Fe.
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Benjamin Balke, S. Wurmehl, Gerhard H. Fecher et al. · Applied Physics Letters · 2007 · 112 citations
Natural Sciences, Materials Engineering, Materials Science +14
Very low chemical disorder in epitaxial NiMnSb films on GaAs(111)B
W. Van Roy, M. Wójcik, E. Jędryka et al. · Applied Physics Letters · 2003 · 51 citations