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dc.contributor.author
Sereni, Julian Gustavo Renzo
dc.contributor.author
Giovannini, M.
dc.contributor.author
Gomez Berisso, Mariano
dc.contributor.author
Gastaldo, Marcelo Fabian
dc.date.available
2019-04-15T15:41:36Z
dc.date.issued
2016-09-16
dc.identifier.citation
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
dc.identifier.issn
0953-8984
dc.identifier.uri
http://hdl.handle.net/11336/74371
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Magnetic Frustration
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Cerium Compounds
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Specific Heat
dc.subject
Entropy
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Competition between ferromagnetism and frustrated antiferromagnetism in quasi 2D Ce-2.15 (Pd1-xAgx)(1.95)In-0.9 alloys
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-04-11T19:49:51Z
dc.journal.volume
28
dc.journal.number
2016
dc.journal.pagination
475601-1/9
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
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
dc.description.fil
Fil: Giovannini, M.. Università di Genova; Italia
dc.description.fil
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
dc.description.fil
Fil: Gastaldo, Marcelo Fabian. Università di Genova; Italia
dc.journal.title
Journal of Physics: Condensed Matter
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/0953-8984/28/47/475601
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/0953-8984/28/47/475601/meta


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