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Sökning: WFRF:(Romashev L. N.)

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1.
  • Andreeva, M. A., et al. (författare)
  • Polarization selection in Mössbauer reflectivity for magnetic multilayer investigation
  • 2019
  • Ingår i: VII Euro-Asian Symposium on Trends In Magnetism. - : IOP Publishing.
  • Konferensbidrag (refereegranskat)abstract
    • Mossbauer reflectivity experiment with polarization selection are reported. The use of the LiF polarization analyzer allows us to get the pi ->sigma' peak on the reflectivity curve at the critical angle and Mossbauer pi ->sigma' reflectivity spectra of reasonable quality at the critical angle and also at the Bragg angles of superlattice. The impressive difference of the reflectivity spectra measured near the critical angle with and without polarizations analysis is observed for [Fe-57(10)/V-10](20) multilayer characterizing by the ferromagnetic interlayer coupling. The combined fit of the whole set of spectra measured at different angles reveals the existence of antiferromagnetic Fe oxide phases in the top three bilayers. The experiment demonstrates benefits of the Mossbauer reflectivity with polarization analysis in ultrathin surface layer investigations.
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2.
  • Ryazhkin, A. V., et al. (författare)
  • Local atomic structure of Fe-Ni/V multilayer nanostructures : EXAFS spectroscopy and synchrotron radiation data
  • 2008
  • Ingår i: Journal of Structural Chemistry. - : Springer Science and Business Media LLC. - 0022-4766 .- 1573-8779. ; 49:1, s. S129-S137
  • Tidskriftsartikel (refereegranskat)abstract
    • Fe, Ni, and V K EXAFS spectroscopic experiments were carried out at the European Synchrotron Radiation Center (ESRF) in the fluorescent mode on the 26 angstrom line with the use of the [(Fe82Ni18)(5)/V-6](25) and [(Fe82Ni18)(10)/V-6](25) samples of multilayer nanoheterostructures prepared by magnetron spraying (at Uppsala University). The partial interatomic distances were determined by the regularization technique. The existing distortions of the bee lattice in (Fe82N18)/V multilayer nanostructures depend strongly on the thickness of the ferromagnetic layers of the permalloy and also affect vanadium layers.
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