Abnormal Temperature Dependence of the Coercive Feld in FePt thin films

Autores
Guzmán, Jonás Manuel; Alvarez, Nadia Roxana; Salva, Horacio Ramon; Vasquez Mansilla, Marcelo; Gomez, Javier Enrique; Butera, Alejandro Ricardo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have observed notable changes in the magnetic response of FePt thin films that we have attributed to a transition in the magnetic domain structure when the film thickness or the temperature is varied. The critical thickness for this transition depends on the Q-factor, Q=Kperp/2PiMs^2, so that a change in thedomain structure is expected when changes in the perpendicular anisotropy, Kperp , or the saturation magnetization, Ms, occur. At room temperature these samples have Q ~ 0:3, and a transition between planar to stripe-like domains occurs for a film thickness d ~ 30 nm. Due to the different thermal expansion of the FePt alloy and the Si substrate a reduction in Q is predicted when the temperature is lowered. From magnetization vs. field loops measured at different temperatures below T=300 K, we have effectively observed a change in the coercive field which can be associated to a transition from stripe-like to in-plane domains. The transition temperature range is broad, indicating a gradual variation between the two magnetic configurations, but changes systematically with film thickness, consistent with an interfacial induced stress. A model that includes the temperature dependence of the strain and the magnetization, predicts correctly the observation of a larger critical thickness at lower temperatures.
Fil: Guzmán, Jonás Manuel. Universidad Nacional de Cordoba. Facultad de Ciencias Quimicas; Argentina
Fil: Alvarez, Nadia Roxana. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina
Fil: Salva, Horacio Ramon. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina
Fil: Vasquez Mansilla, Marcelo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo; Argentina
Fil: Gomez, Javier Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Universidad Nacional de Cuyo; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Butera, Alejandro Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina
Materia
Fept
Thin Films
Magnetic Anisotropy
Critical Thickness
Strain Induced Anisotropy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/11059
Acceder
id CONICETDig_a4c8a969e29e222720e5e4949a0de174
oai_identifier_str oai:ri.conicet.gov.ar:11336/11059
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Abnormal Temperature Dependence of the Coercive Feld in FePt thin filmsGuzmán, Jonás ManuelAlvarez, Nadia RoxanaSalva, Horacio RamonVasquez Mansilla, MarceloGomez, Javier EnriqueButera, Alejandro RicardoFeptThin FilmsMagnetic AnisotropyCritical ThicknessStrain Induced Anisotropyhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We have observed notable changes in the magnetic response of FePt thin films that we have attributed to a transition in the magnetic domain structure when the film thickness or the temperature is varied. The critical thickness for this transition depends on the Q-factor, Q=Kperp/2PiMs^2, so that a change in thedomain structure is expected when changes in the perpendicular anisotropy, Kperp , or the saturation magnetization, Ms, occur. At room temperature these samples have Q ~ 0:3, and a transition between planar to stripe-like domains occurs for a film thickness d ~ 30 nm. Due to the different thermal expansion of the FePt alloy and the Si substrate a reduction in Q is predicted when the temperature is lowered. From magnetization vs. field loops measured at different temperatures below T=300 K, we have effectively observed a change in the coercive field which can be associated to a transition from stripe-like to in-plane domains. The transition temperature range is broad, indicating a gradual variation between the two magnetic configurations, but changes systematically with film thickness, consistent with an interfacial induced stress. A model that includes the temperature dependence of the strain and the magnetization, predicts correctly the observation of a larger critical thickness at lower temperatures.Fil: Guzmán, Jonás Manuel. Universidad Nacional de Cordoba. Facultad de Ciencias Quimicas; ArgentinaFil: Alvarez, Nadia Roxana. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; ArgentinaFil: Salva, Horacio Ramon. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; ArgentinaFil: Vasquez Mansilla, Marcelo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo; ArgentinaFil: Gomez, Javier Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Universidad Nacional de Cuyo; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Butera, Alejandro Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; ArgentinaElsevier Science2013-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/11059Guzmán, Jonás Manuel; Alvarez, Nadia Roxana; Salva, Horacio Ramon; Vasquez Mansilla, Marcelo; Gomez, Javier Enrique; et al.; Abnormal Temperature Dependence of the Coercive Feld in FePt thin films; Elsevier Science; Journal Of Magnetism And Magnetic Materials; 347; 12-2013; 61-670304-8853enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0304885313005222info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmmm.2013.07.037info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:46:29Zoai:ri.conicet.gov.ar:11336/11059instacron: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:34982025-10-15 14:46:29.629CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
title Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
spellingShingle Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
Guzmán, Jonás Manuel
Fept
Thin Films
Magnetic Anisotropy
Critical Thickness
Strain Induced Anisotropy
title_short Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
title_full Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
title_fullStr Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
title_full_unstemmed Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
title_sort Abnormal Temperature Dependence of the Coercive Feld in FePt thin films
dc.creator.none.fl_str_mv Guzmán, Jonás Manuel
Alvarez, Nadia Roxana
Salva, Horacio Ramon
Vasquez Mansilla, Marcelo
Gomez, Javier Enrique
Butera, Alejandro Ricardo
author Guzmán, Jonás Manuel
author_facet Guzmán, Jonás Manuel
Alvarez, Nadia Roxana
Salva, Horacio Ramon
Vasquez Mansilla, Marcelo
Gomez, Javier Enrique
Butera, Alejandro Ricardo
author_role author
author2 Alvarez, Nadia Roxana
Salva, Horacio Ramon
Vasquez Mansilla, Marcelo
Gomez, Javier Enrique
Butera, Alejandro Ricardo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Fept
Thin Films
Magnetic Anisotropy
Critical Thickness
Strain Induced Anisotropy
topic Fept
Thin Films
Magnetic Anisotropy
Critical Thickness
Strain Induced Anisotropy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We have observed notable changes in the magnetic response of FePt thin films that we have attributed to a transition in the magnetic domain structure when the film thickness or the temperature is varied. The critical thickness for this transition depends on the Q-factor, Q=Kperp/2PiMs^2, so that a change in thedomain structure is expected when changes in the perpendicular anisotropy, Kperp , or the saturation magnetization, Ms, occur. At room temperature these samples have Q ~ 0:3, and a transition between planar to stripe-like domains occurs for a film thickness d ~ 30 nm. Due to the different thermal expansion of the FePt alloy and the Si substrate a reduction in Q is predicted when the temperature is lowered. From magnetization vs. field loops measured at different temperatures below T=300 K, we have effectively observed a change in the coercive field which can be associated to a transition from stripe-like to in-plane domains. The transition temperature range is broad, indicating a gradual variation between the two magnetic configurations, but changes systematically with film thickness, consistent with an interfacial induced stress. A model that includes the temperature dependence of the strain and the magnetization, predicts correctly the observation of a larger critical thickness at lower temperatures.
Fil: Guzmán, Jonás Manuel. Universidad Nacional de Cordoba. Facultad de Ciencias Quimicas; Argentina
Fil: Alvarez, Nadia Roxana. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina
Fil: Salva, Horacio Ramon. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina
Fil: Vasquez Mansilla, Marcelo. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cuyo; Argentina
Fil: Gomez, Javier Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Universidad Nacional de Cuyo; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Butera, Alejandro Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte; Argentina. Comision Nacional de Energia Atomica. Centro Atomico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina. Universidad Nacional de Cuyo; Argentina
description We have observed notable changes in the magnetic response of FePt thin films that we have attributed to a transition in the magnetic domain structure when the film thickness or the temperature is varied. The critical thickness for this transition depends on the Q-factor, Q=Kperp/2PiMs^2, so that a change in thedomain structure is expected when changes in the perpendicular anisotropy, Kperp , or the saturation magnetization, Ms, occur. At room temperature these samples have Q ~ 0:3, and a transition between planar to stripe-like domains occurs for a film thickness d ~ 30 nm. Due to the different thermal expansion of the FePt alloy and the Si substrate a reduction in Q is predicted when the temperature is lowered. From magnetization vs. field loops measured at different temperatures below T=300 K, we have effectively observed a change in the coercive field which can be associated to a transition from stripe-like to in-plane domains. The transition temperature range is broad, indicating a gradual variation between the two magnetic configurations, but changes systematically with film thickness, consistent with an interfacial induced stress. A model that includes the temperature dependence of the strain and the magnetization, predicts correctly the observation of a larger critical thickness at lower temperatures.
publishDate 2013
dc.date.none.fl_str_mv 2013-12
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/11336/11059
Guzmán, Jonás Manuel; Alvarez, Nadia Roxana; Salva, Horacio Ramon; Vasquez Mansilla, Marcelo; Gomez, Javier Enrique; et al.; Abnormal Temperature Dependence of the Coercive Feld in FePt thin films; Elsevier Science; Journal Of Magnetism And Magnetic Materials; 347; 12-2013; 61-67
0304-8853
url http://hdl.handle.net/11336/11059
identifier_str_mv Guzmán, Jonás Manuel; Alvarez, Nadia Roxana; Salva, Horacio Ramon; Vasquez Mansilla, Marcelo; Gomez, Javier Enrique; et al.; Abnormal Temperature Dependence of the Coercive Feld in FePt thin films; Elsevier Science; Journal Of Magnetism And Magnetic Materials; 347; 12-2013; 61-67
0304-8853
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0304885313005222
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmmm.2013.07.037
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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 13.22299

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