Magnetic nanostructures of mixed cobalt–samarium clusters View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-12

AUTHORS

M. Negrier, J. Tuaillon-Combes, V. Dupuis, A. Perez, M. Pellarin, M. Broyer

ABSTRACT

We synthesized Co-Sm mixed clusters from a SmCo5 solid target mounted in a laser vaporization source. We studied both pure nanostructured SmCo5-cluster-assembled films and the same isolated clusters embedded in a matrix. The supported cluster size distribution centered around 3 nm was determined from transmission electron microscopy observations. Mass spectra obtained on the photoionized clusters in the gas phase and Rutherford backscattering spectrometry analyses performed on 100-nm-thick films confirm the conservation of the compound-target stoicheiometry in both free and deposited clusters. However, X-ray photoemission spectroscopy measurements seem to indicate a segregation of samarium at the cluster surface. This segregation effect could explain the low values of the magnetization and coercive fields obtained from magnetometry measurements with respect to those in the bulk SmCo5 crystallized phase. More... »

PAGES

475-478

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s100530050481

DOI

http://dx.doi.org/10.1007/s100530050481

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016760432


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