Magnetic properties of Co/Rh (001) multilayers studied by x-ray magnetic-circular dichroism
| Autor: | W. L. O’Brien, Emil Hallin, M. A. Tomaz, E. Mayo, T. K. Sham, David Lederman, G. R. Harp |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Physical Review B. 58:11493-11500 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.58.11493 |
| Popis: | The layer-averaged magnetic moments of Co and Rh have been measured in sputter deposited Co/Rh (001) multilayer thin films using the x-ray magnetic circular dichroism. The Rh moments were measured at both the $L$ and $M$ absorption edges, where we find that the Rh moment decreases as a function of increasing Rh layer thickness ${(t}_{\mathrm{Rh}}).$ The decline of the layer-averaged Rh moment is well described in terms of a simple dilution, implying that the Rh moment is confined to the interfacial region. We find that the Co moment remains largely unaffected, maintaining a bulklike value of $1.7{\ensuremath{\mu}}_{B}$ in the region preceding the first antiferromagnetic coupling peak where ${t}_{\mathrm{Rh}}$ ranges from 0 to 4 \AA{}. We also find, via application of the dichroism sum rules, that the ratio $〈{L}_{z}〉/〈{S}_{z}〉$ for Co increases $\ensuremath{\approx}10%$ for this same region. Finally, we contrast the magnetic behavior of the Co/Rh (001) and Fe/Rh (001) multilayer systems. |
| Databáze: | OpenAIRE |
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