Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/32750
Title: Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
Author: Cebollada, Alfonso
García Martín, J. M.
Clavero, C.
Balcells i Argemí, Lluís
Estradé Albiol, Sònia
Arbiol i Cobos, Jordi
Peiró Martínez, Francisca
Smith, C.
Clarke, R.
Martínez, L.
Huttel, Y.
Román, E.
Telling, N. D.
Van der Laan, G.
Keywords: Propietats magnètiques
Nanopartícules
Cobalt
Matèria condensada
Magnetic properties
Nanoparticles
Cobalt
Condensed matter
Issue Date: 2009
Publisher: American Physical Society
Abstract: We present a detailed study on the morphology and magnetic properties of Co nanostructures deposited onto oxidized Si substrates by femtosecond pulsed laser deposition. Generally, Co disks of nanometric dimensions are obtained just above the ablation threshold, with a size distribution characterized by an increasingly larger number of disks as their size diminishes, and with a maximum disk size that depends on the laser power density. In Au/Co/Au structures, in-plane magnetic anisotropy is observed in all cases, with no indication of superparamagnetism regardless of the amount of material or the laser power density. Magnetic force microscopy observations show coexistence of single-domain and vortex states for the magnetic domain structure of the disks. Superconducting quantum interference device magnetometry and x-ray magnetic circular dichroism measurements point to saturation magnetization values lower than the bulk, probably due to partial oxidation of the Co resulting from incomplete coverage by the Au capping layer.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.79.014414
It is part of: Physical Review B, 2009, vol. 79, p. 014414-1-014414-13
Related resource: http://dx.doi.org/10.1103/PhysRevB.79.014414
URI: http://hdl.handle.net/2445/32750
ISSN: 1098-0121
Appears in Collections:Articles publicats en revistes (Electrònica)

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