Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/29290 |
Resumo: | We investigate the magnetic properties in a system engineered to present Co grains laterally surrounded by a CoO matrix. By considering ferromagnetic SiO2/Co/CoO granular multilayers produced by sequential sputtering deposition, we verify that the Co grains present strong interfacial exchange coupling with the CoO matrix, assigned by the exchange bias effect as well as the raise of the Co blocking temperature. Morever, through magnetization and Hall resistivity experiments, we observe that the antiferromagnetic ordering temperature and exchange bias are dependent on the thickness of the antiferromagnetic material, attributed to finite size effects, as well as we find that the Co blocking temperature is raised as the CoO layer becomes thicker. We discuss the experimental results in terms of the growth mode of the layers, morphological properties of the multilayers, and temperature dependence of the magnetic behavior. The results place the sequential sputtering deposition as a promising alternative technique to produce Co/CoO granular multilayers |
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Gomes, Matheus GaminoMichea, SebastiánDenardin, Juliano C.Schelp, Luiz F.Corrêa, Marcio AssolinBohn, FelipeDorneles, Lúcio S.2020-06-17T19:19:42Z2020-06-17T19:19:42Z2017-10-01GAMINO, M.; MICHEA, S.; DENARDIN, J.C.; SCHELP, L.F.; CORREA, M.A.; BOHN, F.; DORNELES, L.S.. Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering. Journal Of Magnetism And Magnetic Materials, [s.l.], v. 439, p. 6-12, out. 2017. Elsevier. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885317308089?via%3Dihub. Acesso em: 10 jun. 2020. http://dx.doi.org/10.1016/j.jmmm.2017.04.095.0304-8853https://repositorio.ufrn.br/jspui/handle/123456789/2929010.1016/j.jmmm.2017.04.095ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessMagnetic propertiesExchange biasExtraordinary Hall effectGranular multilayersExchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputteringinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleWe investigate the magnetic properties in a system engineered to present Co grains laterally surrounded by a CoO matrix. By considering ferromagnetic SiO2/Co/CoO granular multilayers produced by sequential sputtering deposition, we verify that the Co grains present strong interfacial exchange coupling with the CoO matrix, assigned by the exchange bias effect as well as the raise of the Co blocking temperature. Morever, through magnetization and Hall resistivity experiments, we observe that the antiferromagnetic ordering temperature and exchange bias are dependent on the thickness of the antiferromagnetic material, attributed to finite size effects, as well as we find that the Co blocking temperature is raised as the CoO layer becomes thicker. We discuss the experimental results in terms of the growth mode of the layers, morphological properties of the multilayers, and temperature dependence of the magnetic behavior. The results place the sequential sputtering deposition as a promising alternative technique to produce Co/CoO granular multilayersengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALExchange-biased_BOHN_2017.pdfExchange-biased_BOHN_2017.pdfArtigoapplication/pdf1107003https://repositorio.ufrn.br/bitstream/123456789/29290/1/Exchange-biased_BOHN_2017.pdf8d656eabe90b79c6dfb50c81596ac495MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29290/3/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD53LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29290/4/license.txte9597aa2854d128fd968be5edc8a28d9MD54TEXTExchange-biased_BOHN_2017.pdf.txtExchange-biased_BOHN_2017.pdf.txtExtracted texttext/plain37329https://repositorio.ufrn.br/bitstream/123456789/29290/5/Exchange-biased_BOHN_2017.pdf.txtaa6ee874652d5713af699b77e0207090MD55THUMBNAILExchange-biased_BOHN_2017.pdf.jpgExchange-biased_BOHN_2017.pdf.jpgGenerated Thumbnailimage/jpeg1701https://repositorio.ufrn.br/bitstream/123456789/29290/6/Exchange-biased_BOHN_2017.pdf.jpgd792d70c7fdde14420f5aa7368396c69MD56123456789/292902020-06-21 04:44:53.523oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-06-21T07:44:53Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
title |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
spellingShingle |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering Gomes, Matheus Gamino Magnetic properties Exchange bias Extraordinary Hall effect Granular multilayers |
title_short |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
title_full |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
title_fullStr |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
title_full_unstemmed |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
title_sort |
Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering |
author |
Gomes, Matheus Gamino |
author_facet |
Gomes, Matheus Gamino Michea, Sebastián Denardin, Juliano C. Schelp, Luiz F. Corrêa, Marcio Assolin Bohn, Felipe Dorneles, Lúcio S. |
author_role |
author |
author2 |
Michea, Sebastián Denardin, Juliano C. Schelp, Luiz F. Corrêa, Marcio Assolin Bohn, Felipe Dorneles, Lúcio S. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Gomes, Matheus Gamino Michea, Sebastián Denardin, Juliano C. Schelp, Luiz F. Corrêa, Marcio Assolin Bohn, Felipe Dorneles, Lúcio S. |
dc.subject.por.fl_str_mv |
Magnetic properties Exchange bias Extraordinary Hall effect Granular multilayers |
topic |
Magnetic properties Exchange bias Extraordinary Hall effect Granular multilayers |
description |
We investigate the magnetic properties in a system engineered to present Co grains laterally surrounded by a CoO matrix. By considering ferromagnetic SiO2/Co/CoO granular multilayers produced by sequential sputtering deposition, we verify that the Co grains present strong interfacial exchange coupling with the CoO matrix, assigned by the exchange bias effect as well as the raise of the Co blocking temperature. Morever, through magnetization and Hall resistivity experiments, we observe that the antiferromagnetic ordering temperature and exchange bias are dependent on the thickness of the antiferromagnetic material, attributed to finite size effects, as well as we find that the Co blocking temperature is raised as the CoO layer becomes thicker. We discuss the experimental results in terms of the growth mode of the layers, morphological properties of the multilayers, and temperature dependence of the magnetic behavior. The results place the sequential sputtering deposition as a promising alternative technique to produce Co/CoO granular multilayers |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-10-01 |
dc.date.accessioned.fl_str_mv |
2020-06-17T19:19:42Z |
dc.date.available.fl_str_mv |
2020-06-17T19:19:42Z |
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 |
GAMINO, M.; MICHEA, S.; DENARDIN, J.C.; SCHELP, L.F.; CORREA, M.A.; BOHN, F.; DORNELES, L.S.. Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering. Journal Of Magnetism And Magnetic Materials, [s.l.], v. 439, p. 6-12, out. 2017. Elsevier. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885317308089?via%3Dihub. Acesso em: 10 jun. 2020. http://dx.doi.org/10.1016/j.jmmm.2017.04.095. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/29290 |
dc.identifier.issn.none.fl_str_mv |
0304-8853 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.jmmm.2017.04.095 |
identifier_str_mv |
GAMINO, M.; MICHEA, S.; DENARDIN, J.C.; SCHELP, L.F.; CORREA, M.A.; BOHN, F.; DORNELES, L.S.. Exchange-biased SiO2/Co/CoO granular multilayers deposited by sequential sputtering. Journal Of Magnetism And Magnetic Materials, [s.l.], v. 439, p. 6-12, out. 2017. Elsevier. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885317308089?via%3Dihub. Acesso em: 10 jun. 2020. http://dx.doi.org/10.1016/j.jmmm.2017.04.095. 0304-8853 10.1016/j.jmmm.2017.04.095 |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/29290 |
dc.language.iso.fl_str_mv |
eng |
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eng |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
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openAccess |
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Elsevier |
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Elsevier |
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