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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/91199
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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 |
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CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.070432 |