Mössbauer studies of ultrathin Fe/Pt multilayers |
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| Authors: | A Simopoulos A Kostikas E Devlin A Jankowski T Tsakalakos |
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| Institution: | (1) NCSR Demokritos, In. Mat. Sc., 153 10, Aghia Paraskevi, Greece;(2) Lawrence Livermore National Laboratory, 94550 Livermore, CA, USA;(3) Rutgers University, 08855-0909 Piscataway, NJ, USA |
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| Abstract: | Summary A series of ultrathin Fe/Pt multilayers, prepared by magnetron sputtering, were studied by CEMS and transmission MS. The Fe-layer
thickness varied from 3 to 12.5 ? and that of Pt from 5 ? to 39 ?. The 3 ?/9 ? Pt sample displays magnetic hyperfine structure
at RT, while the 3 Fe/19 Pt sample is paramagnetic at RT, demonstrating the effect of interlayer interaction. Both samples
display out-of-plane magnetic anisotropy with 39° angle with respect to the vertical for the former and nearly 0° angle for
the latter. The analysis of the spectra of samples with thickness larger than one monolayer of Fe is done with components
assigned to individual Fe monolayers. In all these cases a component appears with a hyperfine field larger by ∼ 10% at RT
and 17% at L.He than the corresponding values of α-Fe. This component is attributed to the first monolayer below the Fe/Pt
interface in accordance with similar results in the Fe/Pd system and with theoretical predictions.
Paper presented at ICAME-95, Rimini, 10–16, September 1995 |
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| Keywords: | Magnetism in interface structures (including layer and superlattice structures) |
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