Coexistence of dipolar frustration and criticality in ferromagnets

Autores
Cannas, Sergio Alejandro; Vindigni, Alessandro
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In real magnets the tendency toward ferromagnetism - promoted by exchange coupling - is usually frustrated by dipolar interaction. As a result, the uniformly ordered phase is replaced by modulated (multidomain) phases, characterized by different order parameters rather than the global magnetization. The transitions occurring within those modulated phases and toward the disordered phase are generally not of second-order type. Nevertheless, strong experimental evidence indicates that a standard critical behavior is recovered when comparatively small fields are applied that stabilize the uniform phase. The resulting power laws are observed with respect to a putative critical point that falls in the portion of the phase diagram occupied by modulated phases, in line with an avoided-criticality scenario. Here we propose a generalization of the scaling hypothesis for ferromagnets, which explains this observation assuming that the dipolar interaction acts as a relevant field, in the sense of renormalization group. We corroborate this proposal with analytic and numerical calculations on the 2D Ising model frustrated by dipolar interaction (isotropic part). Our analysis is directly applicable to thin magnetic films with out-of-plane anisotropy.
Fil: Cannas, Sergio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Vindigni, Alessandro. Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule, Zürich; Suiza
Materia
DIPOLAR INTERACTIONS
CRITICALITY
FRUSTRATION
AVOIDED PHASE TRANSITION
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:11336/91199

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spelling Coexistence of dipolar frustration and criticality in ferromagnetsCannas, Sergio AlejandroVindigni, AlessandroDIPOLAR INTERACTIONSCRITICALITYFRUSTRATIONAVOIDED PHASE TRANSITIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In real magnets the tendency toward ferromagnetism - promoted by exchange coupling - is usually frustrated by dipolar interaction. As a result, the uniformly ordered phase is replaced by modulated (multidomain) phases, characterized by different order parameters rather than the global magnetization. The transitions occurring within those modulated phases and toward the disordered phase are generally not of second-order type. Nevertheless, strong experimental evidence indicates that a standard critical behavior is recovered when comparatively small fields are applied that stabilize the uniform phase. The resulting power laws are observed with respect to a putative critical point that falls in the portion of the phase diagram occupied by modulated phases, in line with an avoided-criticality scenario. Here we propose a generalization of the scaling hypothesis for ferromagnets, which explains this observation assuming that the dipolar interaction acts as a relevant field, in the sense of renormalization group. We corroborate this proposal with analytic and numerical calculations on the 2D Ising model frustrated by dipolar interaction (isotropic part). Our analysis is directly applicable to thin magnetic films with out-of-plane anisotropy.Fil: Cannas, Sergio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Vindigni, Alessandro. Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule, Zürich; SuizaAmerican Physical Society2018-12-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/91199Cannas, Sergio Alejandro; Vindigni, Alessandro; Coexistence of dipolar frustration and criticality in ferromagnets; American Physical Society; Physical Review E; 98; 6; 20-12-20182470-00532470-0045CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevE.98.062131info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pre/abstract/10.1103/PhysRevE.98.062131info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:40Zoai:ri.conicet.gov.ar:11336/91199instacron: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:34982025-09-29 09:33:41.093CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Coexistence of dipolar frustration and criticality in ferromagnets
title Coexistence of dipolar frustration and criticality in ferromagnets
spellingShingle Coexistence of dipolar frustration and criticality in ferromagnets
Cannas, Sergio Alejandro
DIPOLAR INTERACTIONS
CRITICALITY
FRUSTRATION
AVOIDED PHASE TRANSITION
title_short Coexistence of dipolar frustration and criticality in ferromagnets
title_full Coexistence of dipolar frustration and criticality in ferromagnets
title_fullStr Coexistence of dipolar frustration and criticality in ferromagnets
title_full_unstemmed Coexistence of dipolar frustration and criticality in ferromagnets
title_sort Coexistence of dipolar frustration and criticality in ferromagnets
dc.creator.none.fl_str_mv Cannas, Sergio Alejandro
Vindigni, Alessandro
author Cannas, Sergio Alejandro
author_facet Cannas, Sergio Alejandro
Vindigni, Alessandro
author_role author
author2 Vindigni, Alessandro
author2_role author
dc.subject.none.fl_str_mv DIPOLAR INTERACTIONS
CRITICALITY
FRUSTRATION
AVOIDED PHASE TRANSITION
topic DIPOLAR INTERACTIONS
CRITICALITY
FRUSTRATION
AVOIDED PHASE TRANSITION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In real magnets the tendency toward ferromagnetism - promoted by exchange coupling - is usually frustrated by dipolar interaction. As a result, the uniformly ordered phase is replaced by modulated (multidomain) phases, characterized by different order parameters rather than the global magnetization. The transitions occurring within those modulated phases and toward the disordered phase are generally not of second-order type. Nevertheless, strong experimental evidence indicates that a standard critical behavior is recovered when comparatively small fields are applied that stabilize the uniform phase. The resulting power laws are observed with respect to a putative critical point that falls in the portion of the phase diagram occupied by modulated phases, in line with an avoided-criticality scenario. Here we propose a generalization of the scaling hypothesis for ferromagnets, which explains this observation assuming that the dipolar interaction acts as a relevant field, in the sense of renormalization group. We corroborate this proposal with analytic and numerical calculations on the 2D Ising model frustrated by dipolar interaction (isotropic part). Our analysis is directly applicable to thin magnetic films with out-of-plane anisotropy.
Fil: Cannas, Sergio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Vindigni, Alessandro. Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule, Zürich; Suiza
description In real magnets the tendency toward ferromagnetism - promoted by exchange coupling - is usually frustrated by dipolar interaction. As a result, the uniformly ordered phase is replaced by modulated (multidomain) phases, characterized by different order parameters rather than the global magnetization. The transitions occurring within those modulated phases and toward the disordered phase are generally not of second-order type. Nevertheless, strong experimental evidence indicates that a standard critical behavior is recovered when comparatively small fields are applied that stabilize the uniform phase. The resulting power laws are observed with respect to a putative critical point that falls in the portion of the phase diagram occupied by modulated phases, in line with an avoided-criticality scenario. Here we propose a generalization of the scaling hypothesis for ferromagnets, which explains this observation assuming that the dipolar interaction acts as a relevant field, in the sense of renormalization group. We corroborate this proposal with analytic and numerical calculations on the 2D Ising model frustrated by dipolar interaction (isotropic part). Our analysis is directly applicable to thin magnetic films with out-of-plane anisotropy.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-20
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/11336/91199
Cannas, Sergio Alejandro; Vindigni, Alessandro; Coexistence of dipolar frustration and criticality in ferromagnets; American Physical Society; Physical Review E; 98; 6; 20-12-2018
2470-0053
2470-0045
CONICET Digital
CONICET
url http://hdl.handle.net/11336/91199
identifier_str_mv Cannas, Sergio Alejandro; Vindigni, Alessandro; Coexistence of dipolar frustration and criticality in ferromagnets; American Physical Society; Physical Review E; 98; 6; 20-12-2018
2470-0053
2470-0045
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevE.98.062131
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pre/abstract/10.1103/PhysRevE.98.062131
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
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
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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