Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/103927 |
Resumo: | We studied the electronic conductivity and magnetic properties of quasi-one-dimensional Ca₃Co₂O₆ single crystals. The results evidence a variable range hopping conductivity with temperature-induced crossover between one-dimensional (intrachain) and three-dimensional (3D) transport and the opening of a Coulomb gap in the d bands along with the ferromagnetic intrachain ordering. At low temperatures, an applied magnetic field induces a large negative magnetoresistance (MR) in apparent dissociation with the 3D magnetic ordering. Both spin-dependent hopping and field-induced suppression of the Coulomb gap are discussed. The electronic hopping parameters we infer agree remarkably with the accessible Co sites. Surprising narrow peaks corresponding to a transient resistivity decrease are observed on the MR curves. We discuss these in terms of peculiar in-plane magnetization states in an Ising-like Heisenberg antiferromagnetic triangular lattice during the magnetization reversal. |
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Raquet, BertrandBaibich, Mario NorbertoBroto, Jean MarcRakoto, HarisonLambert, SébastienMaignan, Antoine2014-09-30T02:12:35Z20021098-0121http://hdl.handle.net/10183/103927000319169We studied the electronic conductivity and magnetic properties of quasi-one-dimensional Ca₃Co₂O₆ single crystals. The results evidence a variable range hopping conductivity with temperature-induced crossover between one-dimensional (intrachain) and three-dimensional (3D) transport and the opening of a Coulomb gap in the d bands along with the ferromagnetic intrachain ordering. At low temperatures, an applied magnetic field induces a large negative magnetoresistance (MR) in apparent dissociation with the 3D magnetic ordering. Both spin-dependent hopping and field-induced suppression of the Coulomb gap are discussed. The electronic hopping parameters we infer agree remarkably with the accessible Co sites. Surprising narrow peaks corresponding to a transient resistivity decrease are observed on the MR curves. We discuss these in terms of peculiar in-plane magnetization states in an Ising-like Heisenberg antiferromagnetic triangular lattice during the magnetization reversal.application/pdfengPhysical review. B, Condensed matter and materials physics. New York. Vol. 65, no. 10 (Mar. 2002), 104442 6p.Materiais antiferromagnéticosCompostos de cálcioMagnetorresistência giganteMateriais ferromagnéticosModelo de heisenbergHopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystalsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000319169.pdf000319169.pdfTexto completo (inglês)application/pdf93454http://www.lume.ufrgs.br/bitstream/10183/103927/1/000319169.pdfbe2df86a1de3030267d14f0990d25020MD51TEXT000319169.pdf.txt000319169.pdf.txtExtracted Texttext/plain30355http://www.lume.ufrgs.br/bitstream/10183/103927/2/000319169.pdf.txtc97ae72d5b9d01b62088efa9e1aeab1dMD52THUMBNAIL000319169.pdf.jpg000319169.pdf.jpgGenerated Thumbnailimage/jpeg1998http://www.lume.ufrgs.br/bitstream/10183/103927/3/000319169.pdf.jpgdf08e584b350e8c582ec6faf53ac491cMD5310183/1039272023-08-27 03:42:57.217396oai:www.lume.ufrgs.br:10183/103927Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-27T06:42:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
title |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
spellingShingle |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals Raquet, Bertrand Materiais antiferromagnéticos Compostos de cálcio Magnetorresistência gigante Materiais ferromagnéticos Modelo de heisenberg |
title_short |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
title_full |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
title_fullStr |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
title_full_unstemmed |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
title_sort |
Hopping conductivity in one-dimensional Ca/sub 3/Co/sub 2/O/sub 6/ single crystals |
author |
Raquet, Bertrand |
author_facet |
Raquet, Bertrand Baibich, Mario Norberto Broto, Jean Marc Rakoto, Harison Lambert, Sébastien Maignan, Antoine |
author_role |
author |
author2 |
Baibich, Mario Norberto Broto, Jean Marc Rakoto, Harison Lambert, Sébastien Maignan, Antoine |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Raquet, Bertrand Baibich, Mario Norberto Broto, Jean Marc Rakoto, Harison Lambert, Sébastien Maignan, Antoine |
dc.subject.por.fl_str_mv |
Materiais antiferromagnéticos Compostos de cálcio Magnetorresistência gigante Materiais ferromagnéticos Modelo de heisenberg |
topic |
Materiais antiferromagnéticos Compostos de cálcio Magnetorresistência gigante Materiais ferromagnéticos Modelo de heisenberg |
description |
We studied the electronic conductivity and magnetic properties of quasi-one-dimensional Ca₃Co₂O₆ single crystals. The results evidence a variable range hopping conductivity with temperature-induced crossover between one-dimensional (intrachain) and three-dimensional (3D) transport and the opening of a Coulomb gap in the d bands along with the ferromagnetic intrachain ordering. At low temperatures, an applied magnetic field induces a large negative magnetoresistance (MR) in apparent dissociation with the 3D magnetic ordering. Both spin-dependent hopping and field-induced suppression of the Coulomb gap are discussed. The electronic hopping parameters we infer agree remarkably with the accessible Co sites. Surprising narrow peaks corresponding to a transient resistivity decrease are observed on the MR curves. We discuss these in terms of peculiar in-plane magnetization states in an Ising-like Heisenberg antiferromagnetic triangular lattice during the magnetization reversal. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-09-30T02:12:35Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/103927 |
dc.identifier.issn.pt_BR.fl_str_mv |
1098-0121 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000319169 |
identifier_str_mv |
1098-0121 000319169 |
url |
http://hdl.handle.net/10183/103927 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. New York. Vol. 65, no. 10 (Mar. 2002), 104442 6p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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