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Título

Capping layer effects in the structure and composition of Co nanoparticle ultrathin films

AutorArbiol, J.; Peiró, F.; Cornet, A.; Clavero Pérez, César ; Cebollada, Alfonso ; Armelles Reig, Gaspar ; Huttel, Yves
Palabras clavecobalt
magnetic particles
nanoparticles
ferromagnetic materials
aluminium compounds
magnesium compounds
platinum
magnetic thin films
metallic thin films
insulating thin films
transmission electron microscopy
Fecha de publicación12-ene-2005
EditorAmerican Institute of Physics
CitaciónApplied Physic Letters 86, 032510 (2005)
ResumenIn this work, we present the correlation of the magnetic and structural properties of Co nanoparticles deposited by sputtering on Si3N4 substrates at different temperatures, and covered with different capping layers, two insulators, AlN and MgO, and a metal, Pt. High-resolution transmission electron microscopy shows the formation of CoPt3 and Co2N, for the Pt and AlN capping layers, respectively, giving to a significant change of the magnetic behavior. When using a cap of MgO, energy-filtered transmission electron microscopy shows an oxidized shell covering the Co nanoparticles with thickness decreasing as the deposition temperature increases, explaining the changes in the magnetic response induced by the MgO capping layer.
Versión del editorhttp://link.aip.org/link/?APPLAB/86/032510/1
http://dx.doi.org/10.1063/1.1854746
URIhttp://hdl.handle.net/10261/19053
DOI10.1063/1.1854746
ISSN0003-6951
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