Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range

Autores
Alvarez, Nadia Roxana; Alejandro, Gabriela; Gomez, Javier Enrique; Goovaerts, E.; Butera, Alejandro Ricardo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The dynamical behaviour of FePt thin films in the chemically disordered fcc phase has been studied using ferromagnetic resonance spectroscopy in a broad range of frequencies, from 1 to 100 GHz. A set of samples with thicknesses between 9 and 94 nm was investigated at room temperature in order to analyse the damping of the magnetization as a function of the excitation frequency. As expected, the increase in frequency is accompanied by larger resonance fields and linewidths. These two quantities also display an anisotropic response when the external applied field is rotated from the in-plane to the out-of-plane direction. We have observed that in the thicker samples the linewidth is different for fields applied parallel or perpendicular to the film plane which, in principle, should not occur in homogeneous ferromagnetic films. This behaviour could be understood by the presence of a frequency-independent anisotropic inhomogeneous broadening that depends on film thickness, in addition to the Gilbert damping term (α) which gives a linear frequency dependence. Although this last term is in general isotropic, we have measured different values of α for in-plane (α = 0.025(1)) and out-of-plane (α⊥ = 0.021(1)) geometries. These values of the damping constant are considerably smaller than those previously reported in chemically.
Fil: Alvarez, Nadia Roxana. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Alejandro, Gabriela. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Gomez, Javier Enrique. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Goovaerts, E. . Universiteit Antwerpen; Bélgica
Fil: Butera, Alejandro Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Ferromagnetic Resonance
Stripe Domains
Fept
Magnetism
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/8970
Acceder
id CONICETDig_4fe132d494b5645f6d8072143a223492
oai_identifier_str oai:ri.conicet.gov.ar:11336/8970
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency rangeAlvarez, Nadia RoxanaAlejandro, GabrielaGomez, Javier EnriqueGoovaerts, E. Butera, Alejandro RicardoFerromagnetic ResonanceStripe DomainsFeptMagnetismhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The dynamical behaviour of FePt thin films in the chemically disordered fcc phase has been studied using ferromagnetic resonance spectroscopy in a broad range of frequencies, from 1 to 100 GHz. A set of samples with thicknesses between 9 and 94 nm was investigated at room temperature in order to analyse the damping of the magnetization as a function of the excitation frequency. As expected, the increase in frequency is accompanied by larger resonance fields and linewidths. These two quantities also display an anisotropic response when the external applied field is rotated from the in-plane to the out-of-plane direction. We have observed that in the thicker samples the linewidth is different for fields applied parallel or perpendicular to the film plane which, in principle, should not occur in homogeneous ferromagnetic films. This behaviour could be understood by the presence of a frequency-independent anisotropic inhomogeneous broadening that depends on film thickness, in addition to the Gilbert damping term (α) which gives a linear frequency dependence. Although this last term is in general isotropic, we have measured different values of α for in-plane (α = 0.025(1)) and out-of-plane (α⊥ = 0.021(1)) geometries. These values of the damping constant are considerably smaller than those previously reported in chemically.Fil: Alvarez, Nadia Roxana. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Alejandro, Gabriela. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gomez, Javier Enrique. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Goovaerts, E. . Universiteit Antwerpen; BélgicaFil: Butera, Alejandro Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaIop Publishing2013-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8970Alvarez, Nadia Roxana; Alejandro, Gabriela; Gomez, Javier Enrique; Goovaerts, E. ; Butera, Alejandro Ricardo; Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range; Iop Publishing; Journal Of Physics D: Applied Physics; 46; 50; 11-2013; 505001-5050070022-3727enginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/0022-3727/46/50/505001info:eu-repo/semantics/altIdentifier/doi/10.1088/0022-3727/46/50/505001info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:58:33Zoai:ri.conicet.gov.ar:11336/8970instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:58:33.348CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
title Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
spellingShingle Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
Alvarez, Nadia Roxana
Ferromagnetic Resonance
Stripe Domains
Fept
Magnetism
title_short Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
title_full Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
title_fullStr Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
title_full_unstemmed Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
title_sort Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range
dc.creator.none.fl_str_mv Alvarez, Nadia Roxana
Alejandro, Gabriela
Gomez, Javier Enrique
Goovaerts, E.
Butera, Alejandro Ricardo
author Alvarez, Nadia Roxana
author_facet Alvarez, Nadia Roxana
Alejandro, Gabriela
Gomez, Javier Enrique
Goovaerts, E.
Butera, Alejandro Ricardo
author_role author
author2 Alejandro, Gabriela
Gomez, Javier Enrique
Goovaerts, E.
Butera, Alejandro Ricardo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ferromagnetic Resonance
Stripe Domains
Fept
Magnetism
topic Ferromagnetic Resonance
Stripe Domains
Fept
Magnetism
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The dynamical behaviour of FePt thin films in the chemically disordered fcc phase has been studied using ferromagnetic resonance spectroscopy in a broad range of frequencies, from 1 to 100 GHz. A set of samples with thicknesses between 9 and 94 nm was investigated at room temperature in order to analyse the damping of the magnetization as a function of the excitation frequency. As expected, the increase in frequency is accompanied by larger resonance fields and linewidths. These two quantities also display an anisotropic response when the external applied field is rotated from the in-plane to the out-of-plane direction. We have observed that in the thicker samples the linewidth is different for fields applied parallel or perpendicular to the film plane which, in principle, should not occur in homogeneous ferromagnetic films. This behaviour could be understood by the presence of a frequency-independent anisotropic inhomogeneous broadening that depends on film thickness, in addition to the Gilbert damping term (α) which gives a linear frequency dependence. Although this last term is in general isotropic, we have measured different values of α for in-plane (α = 0.025(1)) and out-of-plane (α⊥ = 0.021(1)) geometries. These values of the damping constant are considerably smaller than those previously reported in chemically.
Fil: Alvarez, Nadia Roxana. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Alejandro, Gabriela. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Gomez, Javier Enrique. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Goovaerts, E. . Universiteit Antwerpen; Bélgica
Fil: Butera, Alejandro Ricardo. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The dynamical behaviour of FePt thin films in the chemically disordered fcc phase has been studied using ferromagnetic resonance spectroscopy in a broad range of frequencies, from 1 to 100 GHz. A set of samples with thicknesses between 9 and 94 nm was investigated at room temperature in order to analyse the damping of the magnetization as a function of the excitation frequency. As expected, the increase in frequency is accompanied by larger resonance fields and linewidths. These two quantities also display an anisotropic response when the external applied field is rotated from the in-plane to the out-of-plane direction. We have observed that in the thicker samples the linewidth is different for fields applied parallel or perpendicular to the film plane which, in principle, should not occur in homogeneous ferromagnetic films. This behaviour could be understood by the presence of a frequency-independent anisotropic inhomogeneous broadening that depends on film thickness, in addition to the Gilbert damping term (α) which gives a linear frequency dependence. Although this last term is in general isotropic, we have measured different values of α for in-plane (α = 0.025(1)) and out-of-plane (α⊥ = 0.021(1)) geometries. These values of the damping constant are considerably smaller than those previously reported in chemically.
publishDate 2013
dc.date.none.fl_str_mv 2013-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/8970
Alvarez, Nadia Roxana; Alejandro, Gabriela; Gomez, Javier Enrique; Goovaerts, E. ; Butera, Alejandro Ricardo; Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range; Iop Publishing; Journal Of Physics D: Applied Physics; 46; 50; 11-2013; 505001-505007
0022-3727
url http://hdl.handle.net/11336/8970
identifier_str_mv Alvarez, Nadia Roxana; Alejandro, Gabriela; Gomez, Javier Enrique; Goovaerts, E. ; Butera, Alejandro Ricardo; Relaxation dynamics of ferromagnetic FePt thin films in a broad frequency range; Iop Publishing; Journal Of Physics D: Applied Physics; 46; 50; 11-2013; 505001-505007
0022-3727
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/0022-3727/46/50/505001
info:eu-repo/semantics/altIdentifier/doi/10.1088/0022-3727/46/50/505001
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Iop Publishing
publisher.none.fl_str_mv Iop Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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