Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys

Autores
Sereni, Julian Gustavo Renzo; Giovannini, M.; Gomez Berisso, Mariano; Gastaldo, Marcelo Fabian
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce-2.15(Pd1-xAgx)(1.95)In-0.9 are presented. Pd substitution by Ag depresses T-C(x) from 4.1 K down to 1.1 K for x = 0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to x(cr) approximate to 0.6. The T-C(x) decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T > 30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments (2.56 >= mu(eff) >= 2.4 mu(B)), whereas the low value of the Curie-Weiss temperature theta(P) approximate to -10 K excludes any relevant effect from Kondo screening. The specific heat jump at T-C(x) decreases accordingly, while an anomaly emerges at a fixed temperature T* approximate to 1 K. This unexpected anomaly does not show any associated sign of magnetism checked by AC-susceptibility measurements. Since the total magnetic entropy (evaluated around T = T-C(x = 0)) practically does not change with Ag concentration, the transference of degrees of freedom from the FM component to the non-magnetic T* anomaly is deduced. The origin of this anomaly is attributed to an arising magnetic frustration of the ground state and the consequent entropy bottleneck produced by the divergent increasing of density of excitations at low temperature.
Fil: Sereni, Julian Gustavo Renzo. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Giovannini, M.. Università di Genova; Italia
Fil: Gomez Berisso, Mariano. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Gastaldo, Marcelo Fabian. Università di Genova; Italia
Materia
Magnetic Frustration
Cerium Compounds
Specific Heat
Entropy
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:11336/74371
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloysSereni, Julian Gustavo RenzoGiovannini, M.Gomez Berisso, MarianoGastaldo, Marcelo FabianMagnetic FrustrationCerium CompoundsSpecific HeatEntropyhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce-2.15(Pd1-xAgx)(1.95)In-0.9 are presented. Pd substitution by Ag depresses T-C(x) from 4.1 K down to 1.1 K for x = 0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to x(cr) approximate to 0.6. The T-C(x) decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T > 30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments (2.56 >= mu(eff) >= 2.4 mu(B)), whereas the low value of the Curie-Weiss temperature theta(P) approximate to -10 K excludes any relevant effect from Kondo screening. The specific heat jump at T-C(x) decreases accordingly, while an anomaly emerges at a fixed temperature T* approximate to 1 K. This unexpected anomaly does not show any associated sign of magnetism checked by AC-susceptibility measurements. Since the total magnetic entropy (evaluated around T = T-C(x = 0)) practically does not change with Ag concentration, the transference of degrees of freedom from the FM component to the non-magnetic T* anomaly is deduced. The origin of this anomaly is attributed to an arising magnetic frustration of the ground state and the consequent entropy bottleneck produced by the divergent increasing of density of excitations at low temperature.Fil: Sereni, Julian Gustavo Renzo. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Giovannini, M.. Università di Genova; ItaliaFil: Gomez Berisso, Mariano. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Gastaldo, Marcelo Fabian. Università di Genova; ItaliaIOP Publishing2016-09-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/74371Sereni, Julian Gustavo Renzo; Giovannini, M.; Gomez Berisso, Mariano; Gastaldo, Marcelo Fabian; Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys; IOP Publishing; Journal of Physics: Condensed Matter; 28; 2016; 16-9-2016; 475601-1/90953-8984CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/28/47/475601info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0953-8984/28/47/475601/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:49:01Zoai:ri.conicet.gov.ar:11336/74371instacron: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 09:49:02.124CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
title Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
spellingShingle Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
Sereni, Julian Gustavo Renzo
Magnetic Frustration
Cerium Compounds
Specific Heat
Entropy
title_short Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
title_full Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
title_fullStr Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
title_full_unstemmed Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
title_sort Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
dc.creator.none.fl_str_mv Sereni, Julian Gustavo Renzo
Giovannini, M.
Gomez Berisso, Mariano
Gastaldo, Marcelo Fabian
author Sereni, Julian Gustavo Renzo
author_facet Sereni, Julian Gustavo Renzo
Giovannini, M.
Gomez Berisso, Mariano
Gastaldo, Marcelo Fabian
author_role author
author2 Giovannini, M.
Gomez Berisso, Mariano
Gastaldo, Marcelo Fabian
author2_role author
author
author
dc.subject.none.fl_str_mv Magnetic Frustration
Cerium Compounds
Specific Heat
Entropy
topic Magnetic Frustration
Cerium Compounds
Specific Heat
Entropy
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce-2.15(Pd1-xAgx)(1.95)In-0.9 are presented. Pd substitution by Ag depresses T-C(x) from 4.1 K down to 1.1 K for x = 0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to x(cr) approximate to 0.6. The T-C(x) decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T > 30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments (2.56 >= mu(eff) >= 2.4 mu(B)), whereas the low value of the Curie-Weiss temperature theta(P) approximate to -10 K excludes any relevant effect from Kondo screening. The specific heat jump at T-C(x) decreases accordingly, while an anomaly emerges at a fixed temperature T* approximate to 1 K. This unexpected anomaly does not show any associated sign of magnetism checked by AC-susceptibility measurements. Since the total magnetic entropy (evaluated around T = T-C(x = 0)) practically does not change with Ag concentration, the transference of degrees of freedom from the FM component to the non-magnetic T* anomaly is deduced. The origin of this anomaly is attributed to an arising magnetic frustration of the ground state and the consequent entropy bottleneck produced by the divergent increasing of density of excitations at low temperature.
Fil: Sereni, Julian Gustavo Renzo. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Giovannini, M.. Università di Genova; Italia
Fil: Gomez Berisso, Mariano. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Gastaldo, Marcelo Fabian. Università di Genova; Italia
description Low temperature thermal and magnetic measurements performed on ferro-magneticl (FM) alloys of composition Ce-2.15(Pd1-xAgx)(1.95)In-0.9 are presented. Pd substitution by Ag depresses T-C(x) from 4.1 K down to 1.1 K for x = 0.5, which is related to the increase of band electrons, with a critical concentration extrapolated to x(cr) approximate to 0.6. The T-C(x) decrease is accompanied by a weakening of the magnetization of the FM phase. At high temperature (T > 30 K) the inverse magnetic susceptibility reveals the presence of robust magnetic moments (2.56 >= mu(eff) >= 2.4 mu(B)), whereas the low value of the Curie-Weiss temperature theta(P) approximate to -10 K excludes any relevant effect from Kondo screening. The specific heat jump at T-C(x) decreases accordingly, while an anomaly emerges at a fixed temperature T* approximate to 1 K. This unexpected anomaly does not show any associated sign of magnetism checked by AC-susceptibility measurements. Since the total magnetic entropy (evaluated around T = T-C(x = 0)) practically does not change with Ag concentration, the transference of degrees of freedom from the FM component to the non-magnetic T* anomaly is deduced. The origin of this anomaly is attributed to an arising magnetic frustration of the ground state and the consequent entropy bottleneck produced by the divergent increasing of density of excitations at low temperature.
publishDate 2016
dc.date.none.fl_str_mv 2016-09-16
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/11336/74371
Sereni, Julian Gustavo Renzo; Giovannini, M.; Gomez Berisso, Mariano; Gastaldo, Marcelo Fabian; Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys; IOP Publishing; Journal of Physics: Condensed Matter; 28; 2016; 16-9-2016; 475601-1/9
0953-8984
CONICET Digital
CONICET
url http://hdl.handle.net/11336/74371
identifier_str_mv Sereni, Julian Gustavo Renzo; Giovannini, M.; Gomez Berisso, Mariano; Gastaldo, Marcelo Fabian; Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys; IOP Publishing; Journal of Physics: Condensed Matter; 28; 2016; 16-9-2016; 475601-1/9
0953-8984
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1088/0953-8984/28/47/475601
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0953-8984/28/47/475601/meta
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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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