Anomalous magnetoresistance in Fibonacci multilayers
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/29406 |
Resumo: | We theoretically investigated magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely, [110] and [100]. We considered identical ferromagnetic layers separated by nonmagnetic layers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters for Fe/Cr multilayers, four terms were included in our description of the magnetic energy: Zeeman, cubic anisotropy, bilinear coupling, and biquadratic coupling. The minimum energy was determined by the gradient method and the equilibrium magnetization directions found were used to calculate magnetoresistance curves. By choosing spacers with a thickness such that biquadratic coupling is stronger than bilinear coupling, unusual behaviors for the magnetoresistance were observed: (i) for the [110] case, there is a different behavior for structures based on even and odd Fibonacci generations, and, more interesting, (ii) for the [100] case, we found magnetic field ranges for which the magnetoresistance increases with magnetic field |
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Bezerra, Claudionor GomesMachado, Leonardo DantasCorrêa, Marcio AssolinFeitosa, Carlos Chesman de AraújoPearson, J.E.Hoffman, A.2020-07-02T21:08:24Z2020-07-02T21:08:24Z2012-06-15MACHADO, L.; BEZERRA, C.G.; CORREA, M. A. ; FEITOSA, C.C.A.; PEARSON, J.; HOFFMANN, A. . Anomalous magnetoresistance in Fibonacci multilayers. Physical Review. B: Condensed Matter and Materials Physics, v. 85, p. 224416, 2012. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.224416. Acesso em: 02 jul. 2020. https://doi.org/10.1103/PhysRevB.85.224416.2469-9950https://repositorio.ufrn.br/jspui/handle/123456789/2940610.1103/PhysRevB.85.224416American Physical SocietyAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessFibonacci multilayersMagnetoresistanceAnomalous magnetoresistance in Fibonacci multilayersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleWe theoretically investigated magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely, [110] and [100]. We considered identical ferromagnetic layers separated by nonmagnetic layers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters for Fe/Cr multilayers, four terms were included in our description of the magnetic energy: Zeeman, cubic anisotropy, bilinear coupling, and biquadratic coupling. The minimum energy was determined by the gradient method and the equilibrium magnetization directions found were used to calculate magnetoresistance curves. By choosing spacers with a thickness such that biquadratic coupling is stronger than bilinear coupling, unusual behaviors for the magnetoresistance were observed: (i) for the [110] case, there is a different behavior for structures based on even and odd Fibonacci generations, and, more interesting, (ii) for the [100] case, we found magnetic field ranges for which the magnetoresistance increases with magnetic fieldengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALAnomalousMagnetoresistance_bezerra_2012.pdfAnomalousMagnetoresistance_bezerra_2012.pdfapplication/pdf606769https://repositorio.ufrn.br/bitstream/123456789/29406/1/AnomalousMagnetoresistance_bezerra_2012.pdf606fb318de402111bf264b70526f0bacMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29406/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTAnomalousMagnetoresistance_bezerra_2012.pdf.txtAnomalousMagnetoresistance_bezerra_2012.pdf.txtExtracted texttext/plain24290https://repositorio.ufrn.br/bitstream/123456789/29406/4/AnomalousMagnetoresistance_bezerra_2012.pdf.txtb84ef6fc0240b0531038564b79d6778dMD54THUMBNAILAnomalousMagnetoresistance_bezerra_2012.pdf.jpgAnomalousMagnetoresistance_bezerra_2012.pdf.jpgGenerated Thumbnailimage/jpeg1744https://repositorio.ufrn.br/bitstream/123456789/29406/5/AnomalousMagnetoresistance_bezerra_2012.pdf.jpg77aae05034e93641911c88f62fcd1d0eMD55CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29406/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52123456789/294062020-07-05 04:47:28.209oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-07-05T07:47:28Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Anomalous magnetoresistance in Fibonacci multilayers |
title |
Anomalous magnetoresistance in Fibonacci multilayers |
spellingShingle |
Anomalous magnetoresistance in Fibonacci multilayers Bezerra, Claudionor Gomes Fibonacci multilayers Magnetoresistance |
title_short |
Anomalous magnetoresistance in Fibonacci multilayers |
title_full |
Anomalous magnetoresistance in Fibonacci multilayers |
title_fullStr |
Anomalous magnetoresistance in Fibonacci multilayers |
title_full_unstemmed |
Anomalous magnetoresistance in Fibonacci multilayers |
title_sort |
Anomalous magnetoresistance in Fibonacci multilayers |
author |
Bezerra, Claudionor Gomes |
author_facet |
Bezerra, Claudionor Gomes Machado, Leonardo Dantas Corrêa, Marcio Assolin Feitosa, Carlos Chesman de Araújo Pearson, J.E. Hoffman, A. |
author_role |
author |
author2 |
Machado, Leonardo Dantas Corrêa, Marcio Assolin Feitosa, Carlos Chesman de Araújo Pearson, J.E. Hoffman, A. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Bezerra, Claudionor Gomes Machado, Leonardo Dantas Corrêa, Marcio Assolin Feitosa, Carlos Chesman de Araújo Pearson, J.E. Hoffman, A. |
dc.subject.por.fl_str_mv |
Fibonacci multilayers Magnetoresistance |
topic |
Fibonacci multilayers Magnetoresistance |
description |
We theoretically investigated magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely, [110] and [100]. We considered identical ferromagnetic layers separated by nonmagnetic layers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters for Fe/Cr multilayers, four terms were included in our description of the magnetic energy: Zeeman, cubic anisotropy, bilinear coupling, and biquadratic coupling. The minimum energy was determined by the gradient method and the equilibrium magnetization directions found were used to calculate magnetoresistance curves. By choosing spacers with a thickness such that biquadratic coupling is stronger than bilinear coupling, unusual behaviors for the magnetoresistance were observed: (i) for the [110] case, there is a different behavior for structures based on even and odd Fibonacci generations, and, more interesting, (ii) for the [100] case, we found magnetic field ranges for which the magnetoresistance increases with magnetic field |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012-06-15 |
dc.date.accessioned.fl_str_mv |
2020-07-02T21:08:24Z |
dc.date.available.fl_str_mv |
2020-07-02T21:08:24Z |
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 |
MACHADO, L.; BEZERRA, C.G.; CORREA, M. A. ; FEITOSA, C.C.A.; PEARSON, J.; HOFFMANN, A. . Anomalous magnetoresistance in Fibonacci multilayers. Physical Review. B: Condensed Matter and Materials Physics, v. 85, p. 224416, 2012. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.224416. Acesso em: 02 jul. 2020. https://doi.org/10.1103/PhysRevB.85.224416. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/29406 |
dc.identifier.issn.none.fl_str_mv |
2469-9950 |
dc.identifier.doi.none.fl_str_mv |
10.1103/PhysRevB.85.224416 |
identifier_str_mv |
MACHADO, L.; BEZERRA, C.G.; CORREA, M. A. ; FEITOSA, C.C.A.; PEARSON, J.; HOFFMANN, A. . Anomalous magnetoresistance in Fibonacci multilayers. Physical Review. B: Condensed Matter and Materials Physics, v. 85, p. 224416, 2012. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.224416. Acesso em: 02 jul. 2020. https://doi.org/10.1103/PhysRevB.85.224416. 2469-9950 10.1103/PhysRevB.85.224416 |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/29406 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
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/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
American Physical Society |
publisher.none.fl_str_mv |
American Physical Society |
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