Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound

Autores
Sagredo, V.; Torres Molina, Teobaldo Enrique; Delgado, G. E.; Rincón, Carlos Gustavo
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4, that crystallizes in a rhombohedral defect structure with space group R3m(D3d5), was studied by optical absorption spectra. The data were analyzed in terms of current theoretical models that take into account the contribution of antiferromagnetic exchange interaction between spins to the shift of the energy gap EG with T in the vicinity of the critical paramagnetic to spin-glass phase transition. It was established that short- and long-range effect spin correlations dominate the contribution to this shift in the critical region below about 20 K, near the spin-glass freezing temperature Tf, and noncritical one, between about 70 and 160 K, far from Tf, respectively. An intermediate temperature region, compatible with the behaviour expected for a cluster-glass transition where a gradual freezing of the magnetic moments occurs, was also observed.
Fil: Sagredo, V.. Universidad de Los Andes; Venezuela
Fil: Torres Molina, Teobaldo Enrique. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Delgado, G. E.. Universidad de Los Andes; Venezuela
Fil: Rincón, Carlos Gustavo. Universidad de Los Andes; Venezuela
Materia
ELECTRONIC BAND STRUCTURE
EXCHANGE AND SUPEREXCHANGE
ORDER-DISORDER EFFECTS
SEMICONDUCTORS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/123711
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compoundSagredo, V.Torres Molina, Teobaldo EnriqueDelgado, G. E.Rincón, Carlos GustavoELECTRONIC BAND STRUCTUREEXCHANGE AND SUPEREXCHANGEORDER-DISORDER EFFECTSSEMICONDUCTORShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4, that crystallizes in a rhombohedral defect structure with space group R3m(D3d5), was studied by optical absorption spectra. The data were analyzed in terms of current theoretical models that take into account the contribution of antiferromagnetic exchange interaction between spins to the shift of the energy gap EG with T in the vicinity of the critical paramagnetic to spin-glass phase transition. It was established that short- and long-range effect spin correlations dominate the contribution to this shift in the critical region below about 20 K, near the spin-glass freezing temperature Tf, and noncritical one, between about 70 and 160 K, far from Tf, respectively. An intermediate temperature region, compatible with the behaviour expected for a cluster-glass transition where a gradual freezing of the magnetic moments occurs, was also observed.Fil: Sagredo, V.. Universidad de Los Andes; VenezuelaFil: Torres Molina, Teobaldo Enrique. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Delgado, G. E.. Universidad de Los Andes; VenezuelaFil: Rincón, Carlos Gustavo. Universidad de Los Andes; VenezuelaSociedad Mexicana de Física2019-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/123711Sagredo, V.; Torres Molina, Teobaldo Enrique; Delgado, G. E.; Rincón, Carlos Gustavo; Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound; Sociedad Mexicana de Física; Revista Mexicana de Física; 65; 1; 1-2019; 14-190035-001XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.31349/RevMexFis.65.14info:eu-repo/semantics/altIdentifier/url/http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0035-001X2019000100014&lng=en&nrm=iso&tlng=eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:41:55Zoai:ri.conicet.gov.ar:11336/123711instacron: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:34982025-09-29 10:41:55.917CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
title Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
spellingShingle Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
Sagredo, V.
ELECTRONIC BAND STRUCTURE
EXCHANGE AND SUPEREXCHANGE
ORDER-DISORDER EFFECTS
SEMICONDUCTORS
title_short Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
title_full Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
title_fullStr Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
title_full_unstemmed Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
title_sort Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound
dc.creator.none.fl_str_mv Sagredo, V.
Torres Molina, Teobaldo Enrique
Delgado, G. E.
Rincón, Carlos Gustavo
author Sagredo, V.
author_facet Sagredo, V.
Torres Molina, Teobaldo Enrique
Delgado, G. E.
Rincón, Carlos Gustavo
author_role author
author2 Torres Molina, Teobaldo Enrique
Delgado, G. E.
Rincón, Carlos Gustavo
author2_role author
author
author
dc.subject.none.fl_str_mv ELECTRONIC BAND STRUCTURE
EXCHANGE AND SUPEREXCHANGE
ORDER-DISORDER EFFECTS
SEMICONDUCTORS
topic ELECTRONIC BAND STRUCTURE
EXCHANGE AND SUPEREXCHANGE
ORDER-DISORDER EFFECTS
SEMICONDUCTORS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4, that crystallizes in a rhombohedral defect structure with space group R3m(D3d5), was studied by optical absorption spectra. The data were analyzed in terms of current theoretical models that take into account the contribution of antiferromagnetic exchange interaction between spins to the shift of the energy gap EG with T in the vicinity of the critical paramagnetic to spin-glass phase transition. It was established that short- and long-range effect spin correlations dominate the contribution to this shift in the critical region below about 20 K, near the spin-glass freezing temperature Tf, and noncritical one, between about 70 and 160 K, far from Tf, respectively. An intermediate temperature region, compatible with the behaviour expected for a cluster-glass transition where a gradual freezing of the magnetic moments occurs, was also observed.
Fil: Sagredo, V.. Universidad de Los Andes; Venezuela
Fil: Torres Molina, Teobaldo Enrique. Universidad de Zaragoza. Instituto de Nanociencia de Aragón; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Delgado, G. E.. Universidad de Los Andes; Venezuela
Fil: Rincón, Carlos Gustavo. Universidad de Los Andes; Venezuela
description The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4, that crystallizes in a rhombohedral defect structure with space group R3m(D3d5), was studied by optical absorption spectra. The data were analyzed in terms of current theoretical models that take into account the contribution of antiferromagnetic exchange interaction between spins to the shift of the energy gap EG with T in the vicinity of the critical paramagnetic to spin-glass phase transition. It was established that short- and long-range effect spin correlations dominate the contribution to this shift in the critical region below about 20 K, near the spin-glass freezing temperature Tf, and noncritical one, between about 70 and 160 K, far from Tf, respectively. An intermediate temperature region, compatible with the behaviour expected for a cluster-glass transition where a gradual freezing of the magnetic moments occurs, was also observed.
publishDate 2019
dc.date.none.fl_str_mv 2019-01
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/11336/123711
Sagredo, V.; Torres Molina, Teobaldo Enrique; Delgado, G. E.; Rincón, Carlos Gustavo; Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound; Sociedad Mexicana de Física; Revista Mexicana de Física; 65; 1; 1-2019; 14-19
0035-001X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/123711
identifier_str_mv Sagredo, V.; Torres Molina, Teobaldo Enrique; Delgado, G. E.; Rincón, Carlos Gustavo; Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound; Sociedad Mexicana de Física; Revista Mexicana de Física; 65; 1; 1-2019; 14-19
0035-001X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.31349/RevMexFis.65.14
info:eu-repo/semantics/altIdentifier/url/http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0035-001X2019000100014&lng=en&nrm=iso&tlng=en
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Sociedad Mexicana de Física
publisher.none.fl_str_mv Sociedad Mexicana de Física
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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score 13.070432

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