Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls

Autores
Araujo Velasque, Luciana; Stariolo, Daniel Adrian; Billoni, Orlando Vito
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a theoretical study aimed at elucidating the origin of the inverse symmetry-breaking transitionobserved in ultrathin magnetic films with perpendicular anisotropy. We study the behavior of the dipolar frustratedIsing model in a mean field approximation as well as two other models with simple domain walls. By a numericalanalysis we show that the internal degrees of freedom of the domain walls are decisive for the presence of theinverse symmetry-breaking transition. In particular, we show that in a sharp domain wall model the inversetransition is absent. At high temperatures the additional degrees of freedom of the extended domain wallsincrease the entropy of the system leading to a reduction of the free energy of the stripe phase. Upon lowering thetemperature the domain walls become narrow, and the reduction of the number of degrees of freedom associatedwith them manifests in a reduction of entropy which eventually induces an inverse transition to the competinghomogenous phase. We also show that, for a growing external field at constant temperature, the stripe widthgrows strongly when approaching the critical field line and diverges at the transition. These results indicate thatthe inverse transition is a continuous phase transition and that the domain wall profiles and the temperature havelittle effect on the critical behavior of the period of the domain as a function of the applied field.
Fil: Araujo Velasque, Luciana. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Stariolo, Daniel Adrian. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Billoni, Orlando Vito. 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
Materia
Inverse symmetry-breaking
Ultrathin
Magnetic
Films
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:11336/31665

id CONICETDig_99af2a6101a93c3eeb181d3bd730eadd
oai_identifier_str oai:ri.conicet.gov.ar:11336/31665
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain wallsAraujo Velasque, LucianaStariolo, Daniel AdrianBilloni, Orlando VitoInverse symmetry-breakingUltrathinMagneticFilmshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a theoretical study aimed at elucidating the origin of the inverse symmetry-breaking transitionobserved in ultrathin magnetic films with perpendicular anisotropy. We study the behavior of the dipolar frustratedIsing model in a mean field approximation as well as two other models with simple domain walls. By a numericalanalysis we show that the internal degrees of freedom of the domain walls are decisive for the presence of theinverse symmetry-breaking transition. In particular, we show that in a sharp domain wall model the inversetransition is absent. At high temperatures the additional degrees of freedom of the extended domain wallsincrease the entropy of the system leading to a reduction of the free energy of the stripe phase. Upon lowering thetemperature the domain walls become narrow, and the reduction of the number of degrees of freedom associatedwith them manifests in a reduction of entropy which eventually induces an inverse transition to the competinghomogenous phase. We also show that, for a growing external field at constant temperature, the stripe widthgrows strongly when approaching the critical field line and diverges at the transition. These results indicate thatthe inverse transition is a continuous phase transition and that the domain wall profiles and the temperature havelittle effect on the critical behavior of the period of the domain as a function of the applied field.Fil: Araujo Velasque, Luciana. Universidade Federal do Rio Grande do Sul; BrasilFil: Stariolo, Daniel Adrian. Universidade Federal do Rio Grande do Sul; BrasilFil: Billoni, Orlando Vito. 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; ArgentinaAmerican Physical Society2014-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31665Billoni, Orlando Vito; Araujo Velasque, Luciana; Stariolo, Daniel Adrian; Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 21; 12-2014; 2144081-21440861098-0121CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.90.214408info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.214408info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:40:08Zoai:ri.conicet.gov.ar:11336/31665instacron: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 14:40:08.285CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
title Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
spellingShingle Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
Araujo Velasque, Luciana
Inverse symmetry-breaking
Ultrathin
Magnetic
Films
title_short Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
title_full Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
title_fullStr Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
title_full_unstemmed Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
title_sort Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls
dc.creator.none.fl_str_mv Araujo Velasque, Luciana
Stariolo, Daniel Adrian
Billoni, Orlando Vito
author Araujo Velasque, Luciana
author_facet Araujo Velasque, Luciana
Stariolo, Daniel Adrian
Billoni, Orlando Vito
author_role author
author2 Stariolo, Daniel Adrian
Billoni, Orlando Vito
author2_role author
author
dc.subject.none.fl_str_mv Inverse symmetry-breaking
Ultrathin
Magnetic
Films
topic Inverse symmetry-breaking
Ultrathin
Magnetic
Films
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 present a theoretical study aimed at elucidating the origin of the inverse symmetry-breaking transitionobserved in ultrathin magnetic films with perpendicular anisotropy. We study the behavior of the dipolar frustratedIsing model in a mean field approximation as well as two other models with simple domain walls. By a numericalanalysis we show that the internal degrees of freedom of the domain walls are decisive for the presence of theinverse symmetry-breaking transition. In particular, we show that in a sharp domain wall model the inversetransition is absent. At high temperatures the additional degrees of freedom of the extended domain wallsincrease the entropy of the system leading to a reduction of the free energy of the stripe phase. Upon lowering thetemperature the domain walls become narrow, and the reduction of the number of degrees of freedom associatedwith them manifests in a reduction of entropy which eventually induces an inverse transition to the competinghomogenous phase. We also show that, for a growing external field at constant temperature, the stripe widthgrows strongly when approaching the critical field line and diverges at the transition. These results indicate thatthe inverse transition is a continuous phase transition and that the domain wall profiles and the temperature havelittle effect on the critical behavior of the period of the domain as a function of the applied field.
Fil: Araujo Velasque, Luciana. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Stariolo, Daniel Adrian. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Billoni, Orlando Vito. 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
description We present a theoretical study aimed at elucidating the origin of the inverse symmetry-breaking transitionobserved in ultrathin magnetic films with perpendicular anisotropy. We study the behavior of the dipolar frustratedIsing model in a mean field approximation as well as two other models with simple domain walls. By a numericalanalysis we show that the internal degrees of freedom of the domain walls are decisive for the presence of theinverse symmetry-breaking transition. In particular, we show that in a sharp domain wall model the inversetransition is absent. At high temperatures the additional degrees of freedom of the extended domain wallsincrease the entropy of the system leading to a reduction of the free energy of the stripe phase. Upon lowering thetemperature the domain walls become narrow, and the reduction of the number of degrees of freedom associatedwith them manifests in a reduction of entropy which eventually induces an inverse transition to the competinghomogenous phase. We also show that, for a growing external field at constant temperature, the stripe widthgrows strongly when approaching the critical field line and diverges at the transition. These results indicate thatthe inverse transition is a continuous phase transition and that the domain wall profiles and the temperature havelittle effect on the critical behavior of the period of the domain as a function of the applied field.
publishDate 2014
dc.date.none.fl_str_mv 2014-12
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/11336/31665
Billoni, Orlando Vito; Araujo Velasque, Luciana; Stariolo, Daniel Adrian; Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 21; 12-2014; 2144081-2144086
1098-0121
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31665
identifier_str_mv Billoni, Orlando Vito; Araujo Velasque, Luciana; Stariolo, Daniel Adrian; Inverse transition in the dipolar frustrated Ising ferromagnet: The role of domain walls; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 90; 21; 12-2014; 2144081-2144086
1098-0121
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/PhysRevB.90.214408
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.214408
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
_version_ 1846082890851418112
score 12.891075