Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.

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...

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Autores: 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, Roy, Martínez, L., Huttel, Y., Román, E., Telling, N. D., Van der Laan, G.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/32750
Acceso en línea:https://hdl.handle.net/2445/32750
Access Level:acceso abierto
Palabra clave:Propietats magnètiques
Nanopartícules
Cobalt
Matèria condensada
Magnetic properties
Nanoparticles
Condensed matter
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spelling Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.Cebollada, AlfonsoGarcía Martín, J. M.Clavero, C.Balcells i Argemí, LluísEstradé Albiol, SòniaArbiol i Cobos, JordiPeiró Martínez, FranciscaSmith, C.Clarke, RoyMartínez, L.Huttel, Y.Román, E.Telling, N. D.Van der Laan, G.Propietats magnètiquesNanopartículesCobaltMatèria condensadaMagnetic propertiesNanoparticlesCobaltCondensed matterWe 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.American Physical Society2009info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/32750Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.79.014414Physical Review B, 2009, vol. 79, p. 014414-1-014414-13http://dx.doi.org/10.1103/PhysRevB.79.014414(c) American Physical Society, 2009info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/327502026-05-27T06:46:51Z
dc.title.none.fl_str_mv Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
title Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
spellingShingle Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
Cebollada, Alfonso
Propietats magnètiques
Nanopartícules
Cobalt
Matèria condensada
Magnetic properties
Nanoparticles
Cobalt
Condensed matter
title_short Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
title_full Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
title_fullStr Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
title_full_unstemmed Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
title_sort Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
dc.creator.none.fl_str_mv 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, Roy
Martínez, L.
Huttel, Y.
Román, E.
Telling, N. D.
Van der Laan, G.
author Cebollada, Alfonso
author_facet 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, Roy
Martínez, L.
Huttel, Y.
Román, E.
Telling, N. D.
Van der Laan, G.
author_role author
author2 García Martín, J. M.
Clavero, C.
Balcells i Argemí, Lluís
Estradé Albiol, Sònia
Arbiol i Cobos, Jordi
Peiró Martínez, Francisca
Smith, C.
Clarke, Roy
Martínez, L.
Huttel, Y.
Román, E.
Telling, N. D.
Van der Laan, G.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Propietats magnètiques
Nanopartícules
Cobalt
Matèria condensada
Magnetic properties
Nanoparticles
Cobalt
Condensed matter
topic Propietats magnètiques
Nanopartícules
Cobalt
Matèria condensada
Magnetic properties
Nanoparticles
Cobalt
Condensed matter
description 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.
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/32750
url https://hdl.handle.net/2445/32750
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevB.79.014414
Physical Review B, 2009, vol. 79, p. 014414-1-014414-13
http://dx.doi.org/10.1103/PhysRevB.79.014414
dc.rights.none.fl_str_mv (c) American Physical Society, 2009
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2009
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301629

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