Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)

14 pages, 14 figures.-- PACS nrs.: 75.70.Ak; 75.30.Gw; 73.20.At.

Detalles Bibliográficos
Autores: Moulas, Géraud, Lehnert, Anne, Rusponi, S., Etzkorn, Markus, Bencok, Peter, Gambardella, Pietro, Weinberger, P., Brune, H.
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/10357
Acceso en línea:http://hdl.handle.net/10261/10357
Access Level:acceso abierto
Palabra clave:Ab initio calculations
Band structure
Cobalt alloys
Ferromagnetic materials
Iron alloys
Kerr magneto-optical effect
Magnetic anisotropy
Magnetic circular dichroism
Magnetic moments
Magnetic thin films
Monolayers
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spelling Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)Moulas, GéraudLehnert, AnneRusponi, S.Etzkorn, MarkusBencok, PeterGambardella, PietroWeinberger, P.Brune, H.Ab initio calculationsBand structureCobalt alloysFerromagnetic materialsIron alloysKerr magneto-optical effectMagnetic anisotropyMagnetic circular dichroismMagnetic momentsMagnetic thin filmsMonolayers14 pages, 14 figures.-- PACS nrs.: 75.70.Ak; 75.30.Gw; 73.20.At.et al.The magnetism of 1-ML-thick films of Fe(x)Co(1−x) on Pt(111) was investigated both experimentally, by x-ray magnetic circular dichroism and magneto-optical Kerr effect measurements, and theoretically, by first-principles electronic structure calculations, as a function of the film chemical composition. The calculated Fe and Co spin moments are only weakly dependent on the composition and close to 3µ(B)/atom and 2µ(B)/atom, respectively. This trend is also seen in the experimental data, except for pure Fe, where an effective spin moment of only Seff=(1.2 ± 0.2) µ(B)/atom was measured. On the other hand, both the orbital moment and the magnetic anisotropy energy show a strong composition dependence with maxima close to the Fe(0.5)Co(0.5) stoichiometry. The experiment, in agreement with theory, gives a maximum magnetic anisotropy energy of 0.5 meV/atom, which is more than 2 orders of magnitude larger than the value observed in bulk bcc FeCo and close to that observed for the L10 phase of FePt. The calculations clearly demonstrate that this composition dependence is the result of a fine tuning in the occupation number of the d(x^2−y^2) and d(xy) orbitals due to the Fe-Co electronic hybridization.Financial support from the Swiss National Science Foundation (Grants No. 200020- 109800 and No. 200020-112322) and from the Austrian Science Fund (FWF) within the Joint Research Programme S90 are gratefully acknowledged. Financial support of this work was also provided by the Austrian Science Foundation (Grant No. WK W004) and Oak Ridge National Laboratory (Subcontracts No. 4000043271 and No. 4000063148). We acknowledge the ESRF for provision of beam time and financial support from the EUROCORES 05-SONS-FP-009 SANMAG project of the European Science Foundation.Peer reviewedAmerican Physical SocietySwiss National Science FoundationAustrian Science FundDepartment of Energy (US)European Science Foundation200920092008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501950086 bytesapplication/pdfhttp://hdl.handle.net/10261/10357reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1103/PhysRevB.78.214424info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/103572026-05-22T06:33:51Z
dc.title.none.fl_str_mv Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
title Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
spellingShingle Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
Moulas, Géraud
Ab initio calculations
Band structure
Cobalt alloys
Ferromagnetic materials
Iron alloys
Kerr magneto-optical effect
Magnetic anisotropy
Magnetic circular dichroism
Magnetic moments
Magnetic thin films
Monolayers
title_short Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
title_full Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
title_fullStr Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
title_full_unstemmed Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
title_sort Magnetic properties of ultrathin FexCo(1-x) films on Pt(111)
dc.creator.none.fl_str_mv Moulas, Géraud
Lehnert, Anne
Rusponi, S.
Etzkorn, Markus
Bencok, Peter
Gambardella, Pietro
Weinberger, P.
Brune, H.
author Moulas, Géraud
author_facet Moulas, Géraud
Lehnert, Anne
Rusponi, S.
Etzkorn, Markus
Bencok, Peter
Gambardella, Pietro
Weinberger, P.
Brune, H.
author_role author
author2 Lehnert, Anne
Rusponi, S.
Etzkorn, Markus
Bencok, Peter
Gambardella, Pietro
Weinberger, P.
Brune, H.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Swiss National Science Foundation
Austrian Science Fund
Department of Energy (US)
European Science Foundation
dc.subject.none.fl_str_mv Ab initio calculations
Band structure
Cobalt alloys
Ferromagnetic materials
Iron alloys
Kerr magneto-optical effect
Magnetic anisotropy
Magnetic circular dichroism
Magnetic moments
Magnetic thin films
Monolayers
topic Ab initio calculations
Band structure
Cobalt alloys
Ferromagnetic materials
Iron alloys
Kerr magneto-optical effect
Magnetic anisotropy
Magnetic circular dichroism
Magnetic moments
Magnetic thin films
Monolayers
description 14 pages, 14 figures.-- PACS nrs.: 75.70.Ak; 75.30.Gw; 73.20.At.
publishDate 2008
dc.date.none.fl_str_mv 2008
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/10357
url http://hdl.handle.net/10261/10357
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1103/PhysRevB.78.214424
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 950086 bytes
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 reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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