Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties

Detalhes bibliográficos
Autor(a) principal: Araújo, José Humberto de
Data de Publicação: 2001
Outros Autores: Xavier Júnior, M. M., Cabral, F. A. O., Feitosa, Carlos Chesman de Araújo, Dumelow, T., Sasaki, José Marcos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/45216
Resumo: The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples.
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spelling Araújo, José Humberto deXavier Júnior, M. M.Cabral, F. A. O.Feitosa, Carlos Chesman de AraújoDumelow, T.Sasaki, José Marcos2021-12-07T12:09:22Z2001-05XAVIER JUNIOR, M.M ; CABRAL, F.A.O ; ARAÚJO, José Humberto de ; CHESMAN, Carlos ; DUMELOW, T ; SASAKI, J.M . Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties. Journal of Magnetism and Magnetic Materials, v. 226-230, p. 826-828, 2001. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885301000762?via%3Dihub Acesso em: 28 mai 2020. DOI: https://doi.org/10.1016/S0304-8853(01)00076-2https://repositorio.ufrn.br/handle/123456789/4521610.1016/S0304-8853(01)00076-2The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples.The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples.2031-12-12ElsevierRare earth-transition metal compoundsMagnetoresistanceTransport propertiesMagnetic oxidesEffect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic propertiesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessORIGINALEffectOfFeDopingInPolycrystalline _2001.pdfEffectOfFeDopingInPolycrystalline _2001.pdfapplication/pdf89557https://repositorio.ufrn.br/bitstream/123456789/45216/1/EffectOfFeDopingInPolycrystalline%20_2001.pdf3e52942fe54bcdbac49d59a6209646c6MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/45216/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52123456789/452162024-03-19 01:06:35.398oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2024-03-19T04:06:35Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
spellingShingle Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
Araújo, José Humberto de
Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
title_short Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_full Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_fullStr Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_full_unstemmed Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
title_sort Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties
author Araújo, José Humberto de
author_facet Araújo, José Humberto de
Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
author_role author
author2 Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Araújo, José Humberto de
Xavier Júnior, M. M.
Cabral, F. A. O.
Feitosa, Carlos Chesman de Araújo
Dumelow, T.
Sasaki, José Marcos
dc.subject.por.fl_str_mv Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
topic Rare earth-transition metal compounds
Magnetoresistance
Transport properties
Magnetic oxides
description The effect of Fe doping (⩽10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied through X-ray diffraction, resistivity, AC susceptibility, magnetization, and magnetoresistance measurements. Fe doping was found to change substantially the magnetic and transport properties of the samples, without modifying the lattice structure. In a magnetic field of 5 T, the magnetoresistance of a sample doped with 10% Fe was 4 times greater than that of an undoped sample, near the resistivity peak. This result was explained in terms of the formation of antiferromagnetic clusters of Fe ions. Magnetoresistance did not depend on Fe doping at 5 K, but there was a large magnetoresistive effect in fields less than 0.5 T in all samples. This behavior was attributed to spin polarized tunneling at grain boundaries of polycrystalline samples.
publishDate 2001
dc.date.issued.fl_str_mv 2001-05
dc.date.accessioned.fl_str_mv 2021-12-07T12:09:22Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.citation.fl_str_mv XAVIER JUNIOR, M.M ; CABRAL, F.A.O ; ARAÚJO, José Humberto de ; CHESMAN, Carlos ; DUMELOW, T ; SASAKI, J.M . Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties. Journal of Magnetism and Magnetic Materials, v. 226-230, p. 826-828, 2001. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885301000762?via%3Dihub Acesso em: 28 mai 2020. DOI: https://doi.org/10.1016/S0304-8853(01)00076-2
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45216
dc.identifier.doi.none.fl_str_mv 10.1016/S0304-8853(01)00076-2
identifier_str_mv XAVIER JUNIOR, M.M ; CABRAL, F.A.O ; ARAÚJO, José Humberto de ; CHESMAN, Carlos ; DUMELOW, T ; SASAKI, J.M . Effect of Fe doping in polycrystalline La0.7Sr0.3MnO3 on transport and magnetic properties. Journal of Magnetism and Magnetic Materials, v. 226-230, p. 826-828, 2001. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885301000762?via%3Dihub Acesso em: 28 mai 2020. DOI: https://doi.org/10.1016/S0304-8853(01)00076-2
10.1016/S0304-8853(01)00076-2
url https://repositorio.ufrn.br/handle/123456789/45216
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
bitstream.url.fl_str_mv https://repositorio.ufrn.br/bitstream/123456789/45216/1/EffectOfFeDopingInPolycrystalline%20_2001.pdf
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