Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg

Autores
Michor, H.; Sereni, Julian Gustavo Renzo; Giovannini, M.; Kampert, E.; Salamakha, L.; Hilscher, G.; Bauer, E.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Magnetic, transport, and thermal properties of CeCu2Mg are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, Cmag/T|T→0≈1.2 J/mol K2 and robust effective magnetic moments (μeff≈2.46μB). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on Cmag/T and residual resistivity ρ0 does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at Tmax≈1.2 K in Cmag(T)/T, without changing its position up to μ0H=7.5 T. However, the flattening of Cmag/T|T→0 and its magnetic susceptibility χT→0, together with the T2 dependence of ρ(T), reveal a FL behavior for T≤2 K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic CeCu2Mg in an intermediate section of a frustration-Kondo model. The entropy, Smag, reaches 0.87Rln6 at T≃100 K, with a tendency to approach the expected value Smag=Rln6 of the J=5/2 ground state of Ce3+.
Fil: Michor, H.. Technische Universitat Wien; Austria
Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Giovannini, M.. CNR-SPIN Corso Perrone, Genova; Italia. Università degli Studi di Genova; Italia
Fil: Kampert, E.. Helmholtz-Zentrum Dresden-Rossendorf; Alemania
Fil: Salamakha, L.. Technische Universitat Wien; Austria
Fil: Hilscher, G.. Technische Universitat Wien; Austria
Fil: Bauer, E.. Technische Universitat Wien; Austria
Materia
MAGNETISM
FRUSTRATION
CE COMPOUNDS
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:11336/126141
Acceder
id CONICETDig_d0f854817536aa90e1e0f9af8eabe0ed
oai_identifier_str oai:ri.conicet.gov.ar:11336/126141
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Elucidating the lack of magnetic order in the heavy-fermion CeCu2MgMichor, H.Sereni, Julian Gustavo RenzoGiovannini, M.Kampert, E.Salamakha, L.Hilscher, G.Bauer, E.MAGNETISMFRUSTRATIONCE COMPOUNDShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Magnetic, transport, and thermal properties of CeCu2Mg are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, Cmag/T|T→0≈1.2 J/mol K2 and robust effective magnetic moments (μeff≈2.46μB). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on Cmag/T and residual resistivity ρ0 does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at Tmax≈1.2 K in Cmag(T)/T, without changing its position up to μ0H=7.5 T. However, the flattening of Cmag/T|T→0 and its magnetic susceptibility χT→0, together with the T2 dependence of ρ(T), reveal a FL behavior for T≤2 K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic CeCu2Mg in an intermediate section of a frustration-Kondo model. The entropy, Smag, reaches 0.87Rln6 at T≃100 K, with a tendency to approach the expected value Smag=Rln6 of the J=5/2 ground state of Ce3+.Fil: Michor, H.. Technische Universitat Wien; AustriaFil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Giovannini, M.. CNR-SPIN Corso Perrone, Genova; Italia. Università degli Studi di Genova; ItaliaFil: Kampert, E.. Helmholtz-Zentrum Dresden-Rossendorf; AlemaniaFil: Salamakha, L.. Technische Universitat Wien; AustriaFil: Hilscher, G.. Technische Universitat Wien; AustriaFil: Bauer, E.. Technische Universitat Wien; AustriaAmerican Physical Society2017-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/126141Michor, H.; Sereni, Julian Gustavo Renzo; Giovannini, M.; Kampert, E.; Salamakha, L.; et al.; Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg; American Physical Society; Physical Review B; 95; 11; 3-2017; 1-72469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.95.115146info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.115146info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:55:22Zoai:ri.conicet.gov.ar:11336/126141instacron: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 09:55:22.8CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
title Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
spellingShingle Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
Michor, H.
MAGNETISM
FRUSTRATION
CE COMPOUNDS
title_short Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
title_full Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
title_fullStr Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
title_full_unstemmed Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
title_sort Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg
dc.creator.none.fl_str_mv Michor, H.
Sereni, Julian Gustavo Renzo
Giovannini, M.
Kampert, E.
Salamakha, L.
Hilscher, G.
Bauer, E.
author Michor, H.
author_facet Michor, H.
Sereni, Julian Gustavo Renzo
Giovannini, M.
Kampert, E.
Salamakha, L.
Hilscher, G.
Bauer, E.
author_role author
author2 Sereni, Julian Gustavo Renzo
Giovannini, M.
Kampert, E.
Salamakha, L.
Hilscher, G.
Bauer, E.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv MAGNETISM
FRUSTRATION
CE COMPOUNDS
topic MAGNETISM
FRUSTRATION
CE COMPOUNDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Magnetic, transport, and thermal properties of CeCu2Mg are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, Cmag/T|T→0≈1.2 J/mol K2 and robust effective magnetic moments (μeff≈2.46μB). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on Cmag/T and residual resistivity ρ0 does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at Tmax≈1.2 K in Cmag(T)/T, without changing its position up to μ0H=7.5 T. However, the flattening of Cmag/T|T→0 and its magnetic susceptibility χT→0, together with the T2 dependence of ρ(T), reveal a FL behavior for T≤2 K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic CeCu2Mg in an intermediate section of a frustration-Kondo model. The entropy, Smag, reaches 0.87Rln6 at T≃100 K, with a tendency to approach the expected value Smag=Rln6 of the J=5/2 ground state of Ce3+.
Fil: Michor, H.. Technische Universitat Wien; Austria
Fil: Sereni, Julian Gustavo Renzo. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Bajas Temperaturas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Giovannini, M.. CNR-SPIN Corso Perrone, Genova; Italia. Università degli Studi di Genova; Italia
Fil: Kampert, E.. Helmholtz-Zentrum Dresden-Rossendorf; Alemania
Fil: Salamakha, L.. Technische Universitat Wien; Austria
Fil: Hilscher, G.. Technische Universitat Wien; Austria
Fil: Bauer, E.. Technische Universitat Wien; Austria
description Magnetic, transport, and thermal properties of CeCu2Mg are investigated to elucidate the lack of magnetic order in this heavy-fermion compound with a specific heat value, Cmag/T|T→0≈1.2 J/mol K2 and robust effective magnetic moments (μeff≈2.46μB). The lack of magnetic order is attributed to magnetic frustration favored by the hexagonal configuration of the Ce sublattice. In fact, the effect of magnetic field on Cmag/T and residual resistivity ρ0 does not correspond to that of a Fermi liquid (FL) because a broad anomaly appears at Tmax≈1.2 K in Cmag(T)/T, without changing its position up to μ0H=7.5 T. However, the flattening of Cmag/T|T→0 and its magnetic susceptibility χT→0, together with the T2 dependence of ρ(T), reveal a FL behavior for T≤2 K which is also supported by Wilson and Kadowaki-Woods ratios. The unusual coexistence of FL and frustration phenomena can be understood by placing paramagnetic CeCu2Mg in an intermediate section of a frustration-Kondo model. The entropy, Smag, reaches 0.87Rln6 at T≃100 K, with a tendency to approach the expected value Smag=Rln6 of the J=5/2 ground state of Ce3+.
publishDate 2017
dc.date.none.fl_str_mv 2017-03
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/11336/126141
Michor, H.; Sereni, Julian Gustavo Renzo; Giovannini, M.; Kampert, E.; Salamakha, L.; et al.; Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg; American Physical Society; Physical Review B; 95; 11; 3-2017; 1-7
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/126141
identifier_str_mv Michor, H.; Sereni, Julian Gustavo Renzo; Giovannini, M.; Kampert, E.; Salamakha, L.; et al.; Elucidating the lack of magnetic order in the heavy-fermion CeCu2Mg; American Physical Society; Physical Review B; 95; 11; 3-2017; 1-7
2469-9950
2469-9969
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.95.115146
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.115146
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_ 1842269341233446912
score 13.13397

Publicaciones similares