1,721,033 research outputs found
Thermal magnetic properties of Fe films on Cu3Au investigated by magneto optical Kerr effect
No full textCorrelation between magnetism and structure in ultrathin Fe/Cu3Au(001) films
No full textWe have studied the correlation between the magnetic properties and the structure of ultrathin ferromagnetic
Fe/Cu3Au001 films for thicknesses up to 15 Å. We have found that two different face centered tetragonal
structural phases coexist within the film in the thickness range 5–15 Å. The coexistence of the two structural
phases induces an anomalous thickness dependence of the Curie temperature of the films. We ascribe this
thickness dependence to a difference in the exchange coupling between the two phases. The irreversible
modifications of the magnetic properties of the films after a mild thermal treatment are discussed on the basis
of the corresponding changes of the structure and the morpholog
Surface magnetism of iron films following the adsorption of oxygen: a comparison between Fe/Ag(100) and Fe/MgO(100)
No full textPlasmon dispersion in self-organized Au nanoparticle arrays
No full textWe report on the dispersion relations of surface plasmon resonance (SPR) modes in spatially extended self-organized two-dimensional arrays of closely spaced gold nanoparticles (NPs). The arrays are supported on uniaxially rippled LiF substrates that trigger the organization of the metallic gold NPs in sequences of closely spaced chains. We measured the dispersion of the longitudinal and transverse SPR modes of these chains and successfully reproduced the experimental data by means of a modified effective-medium model. The calculations show that the interchain electromagnetic coupling increases by almost one order of magnitude the SP group velocity in well-defined regions of the Brillouin zone with respect to isolated chains
Yeast Cytochrome c adsorption on SiO2/Si substrates studied by in situ spectroscopic ellipsometry
No full textSurface magnetism during the early stages of oxygen-assisted growth of Cr on Fe(001): A SPMDS study
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