Study of hyperfine interactions in Fe–Co nanocomposite films by Mössbauer spectroscopy and NMR

• Published in: Journal of non-crystalline solids 2008-12, Vol.354 (47), p.5255-5257
• Main Authors: Lancok, A., Fendrych, F., Miglierini, M., Kohout, J., Klementova, M.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mössbauer effect and spectroscopy; Mössbauer effect; other γ-ray spectroscopy; Nanoparticles; Nuclear magnetic (and quadrupole) resonance; Nuclear magnetic resonance and relaxation; Physics; Plasma deposition
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2008.05.074

Nanogranular magnetic films were produced by the specially designed UHV plasma-jet system with DC hollow-cathode discharge. We investigated the properties of these ferromagnetic FeCo-AlN films. The samples were studied by nuclear magnetic resonance, Mössbauer spectroscopy, and transmission electron microscopy. The films are composed of nanoparticles of cubic FeCo, 2–10 nm in size, embedded in amorphous matrix containing Al, N and O. The Mössbauer spectra indicate that the orientation of local magnetic moments on the surface is random for the sample with 1:1 Fe/Co ratio, while the magnetization lays in the plane of the layer for samples with Fe/Co smaller than 1 (0.91–0.95).