Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties

The full substitution of Ni by Co and Pt enclosed in the same crystalline structure (I4/mmm) of Pr-based compounds have been investigated. The structural characteristics, magnetic properties, and magnetoresistance of PrCo2B2C, PrNi2B2C, and PrPt2B2C single crystals were studied to determine the reas...

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Detalles Bibliográficos
Autores: Duran, A, Bernes, S, Falconi, R, Escudero, R, Laborde, O, Guillot, M
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:México
Institución:Universidad Nacional Autónoma de México
Repositorio:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/2316
Acceso en línea:http://hdl.handle.net/11154/2316
Access Level:acceso abierto
Palabra clave:Physics, Condensed Matter
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spelling Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic propertiesDuran, ABernes, SFalconi, REscudero, RLaborde, OGuillot, MPhysics, Condensed MatterThe full substitution of Ni by Co and Pt enclosed in the same crystalline structure (I4/mmm) of Pr-based compounds have been investigated. The structural characteristics, magnetic properties, and magnetoresistance of PrCo2B2C, PrNi2B2C, and PrPt2B2C single crystals were studied to determine the reason for the absence or presence of superconductivity in those compounds. An antiferromagnetic transition was found for PrCo2B2C at about 8.5 K, where the easy magnetization axis is along the c-crystallographic direction whereas in PrNi2B2C the easy magnetization was at the ab plane. In PrNi2B2C a small magnetization without traces of saturation is found when it is measured up to 18 Tesla of applied magnetic field. This behavior suggests a screening effect as a result of a moderate hybridization between the conduction band and Pr ions. Superconductivity occurs in PrPt2B2C at about 6 K. The Pt-Pt distance and internal bonding angles are similar to those observed in the superconducting Ni-based compounds. Magnetoresistance measurements show positive and quadratic behavior (Delta rho/rho(0)similar to aH(2)) suggesting a spin fluctuation system. In the PrPt2B2C compound the electronic mean free path is smaller than the BCS coherence length (iota <epsilon) suggesting a dirty type II superconductor.2011-01-22T10:26:04Z2011-01-22T10:26:04Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1098-0121http://hdl.handle.net/11154/2316130510.1103/PhysRevB.74.13451374(13)reponame:Sistema de Información de la Facultad de Ciencias, UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenPhysical Review Binfo:eu-repo/semantics/openAccessoai:repositorio.fciencias.unam.mx:11154/23162025-09-17T19:20:56Z
dc.title.none.fl_str_mv Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
title Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
spellingShingle Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
Duran, A
Physics, Condensed Matter
title_short Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
title_full Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
title_fullStr Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
title_full_unstemmed Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
title_sort Isomorphous PrT2B2C (T=Co,Ni,Pt) single crystals: Structural, transport, and magnetic properties
dc.creator.none.fl_str_mv Duran, A
Bernes, S
Falconi, R
Escudero, R
Laborde, O
Guillot, M
author Duran, A
author_facet Duran, A
Bernes, S
Falconi, R
Escudero, R
Laborde, O
Guillot, M
author_role author
author2 Bernes, S
Falconi, R
Escudero, R
Laborde, O
Guillot, M
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Physics, Condensed Matter
topic Physics, Condensed Matter
description The full substitution of Ni by Co and Pt enclosed in the same crystalline structure (I4/mmm) of Pr-based compounds have been investigated. The structural characteristics, magnetic properties, and magnetoresistance of PrCo2B2C, PrNi2B2C, and PrPt2B2C single crystals were studied to determine the reason for the absence or presence of superconductivity in those compounds. An antiferromagnetic transition was found for PrCo2B2C at about 8.5 K, where the easy magnetization axis is along the c-crystallographic direction whereas in PrNi2B2C the easy magnetization was at the ab plane. In PrNi2B2C a small magnetization without traces of saturation is found when it is measured up to 18 Tesla of applied magnetic field. This behavior suggests a screening effect as a result of a moderate hybridization between the conduction band and Pr ions. Superconductivity occurs in PrPt2B2C at about 6 K. The Pt-Pt distance and internal bonding angles are similar to those observed in the superconducting Ni-based compounds. Magnetoresistance measurements show positive and quadratic behavior (Delta rho/rho(0)similar to aH(2)) suggesting a spin fluctuation system. In the PrPt2B2C compound the electronic mean free path is smaller than the BCS coherence length (iota <epsilon) suggesting a dirty type II superconductor.
publishDate 2006
dc.date.none.fl_str_mv 2006
2011-01-22T10:26:04Z
2011-01-22T10:26:04Z
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 1098-0121
http://hdl.handle.net/11154/2316
1305
10.1103/PhysRevB.74.134513
identifier_str_mv 1098-0121
1305
10.1103/PhysRevB.74.134513
url http://hdl.handle.net/11154/2316
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv Physical Review B
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv 74(13)
reponame:Sistema de Información de la Facultad de Ciencias, UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Sistema de Información de la Facultad de Ciencias, UNAM
collection Sistema de Información de la Facultad de Ciencias, UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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