Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/141341 |
Resumo: | We have studied Co/Cu multilayers to understand the effect of the sample’s width on their magnetoresistance (MR). By keeping constant both the length and the thickness and exploring the widths within the range of usual magnetic domain sizes in those nanostructures, we were able to observe effects on the MR curve, as well as infer linked changes in the magnetization process. Associating MR and Planar Hall Effect (PHE) measurements, coupled to an analysis of the MR plots’ symmetry, we were able to establish that, apart from the expected antiferromagnetic coupling, reducing the width forces the magnetization to stay aligned to the current channel, thus inducing more symmetric, closer to model Giant Magnetoresistance (GMR). Also, the sample edges might contribute by adding extra coupling through magnetostatic interaction. The added effects result in a counter-intuitive trend that goes from the near ideal wide samples through intermediate sizes with fairly abrupt changes in MR, and finally to the closer to bell-shaped ideal GMR at narrow widths. |
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Lima, Saulo CordeiroBaibich, Mario Norberto2016-05-19T02:10:00Z20160021-8979http://hdl.handle.net/10183/141341000991252We have studied Co/Cu multilayers to understand the effect of the sample’s width on their magnetoresistance (MR). By keeping constant both the length and the thickness and exploring the widths within the range of usual magnetic domain sizes in those nanostructures, we were able to observe effects on the MR curve, as well as infer linked changes in the magnetization process. Associating MR and Planar Hall Effect (PHE) measurements, coupled to an analysis of the MR plots’ symmetry, we were able to establish that, apart from the expected antiferromagnetic coupling, reducing the width forces the magnetization to stay aligned to the current channel, thus inducing more symmetric, closer to model Giant Magnetoresistance (GMR). Also, the sample edges might contribute by adding extra coupling through magnetostatic interaction. The added effects result in a counter-intuitive trend that goes from the near ideal wide samples through intermediate sizes with fairly abrupt changes in MR, and finally to the closer to bell-shaped ideal GMR at narrow widths.application/pdfengJournal of applied physics. New York. Vol. 119, no. 3 (Jan. 2016), 033902, 5 p.Magnetorresistência giganteEfeito hallMagnetizaçãoInfluence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayersEstrangeiroinfo: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:UFRGSORIGINAL000991252.pdf000991252.pdfTexto completo (inglês)application/pdf1003544http://www.lume.ufrgs.br/bitstream/10183/141341/1/000991252.pdf59a5e990dcaea93be64299e4433ce5bdMD51TEXT000991252.pdf.txt000991252.pdf.txtExtracted Texttext/plain24814http://www.lume.ufrgs.br/bitstream/10183/141341/2/000991252.pdf.txt6f634ba6e7f7de9ecd9513e1a3d85f48MD52THUMBNAIL000991252.pdf.jpg000991252.pdf.jpgGenerated Thumbnailimage/jpeg2151http://www.lume.ufrgs.br/bitstream/10183/141341/3/000991252.pdf.jpg1ab588c3c6e97bb2118c69dcce157f99MD5310183/1413412023-08-27 03:43:13.192652oai:www.lume.ufrgs.br:10183/141341Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-27T06:43:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
title |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
spellingShingle |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers Lima, Saulo Cordeiro Magnetorresistência gigante Efeito hall Magnetização |
title_short |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
title_full |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
title_fullStr |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
title_full_unstemmed |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
title_sort |
Influence of sample width on the magnetoresistance and planar Hall effect of Co/Cu multilayers |
author |
Lima, Saulo Cordeiro |
author_facet |
Lima, Saulo Cordeiro Baibich, Mario Norberto |
author_role |
author |
author2 |
Baibich, Mario Norberto |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Lima, Saulo Cordeiro Baibich, Mario Norberto |
dc.subject.por.fl_str_mv |
Magnetorresistência gigante Efeito hall Magnetização |
topic |
Magnetorresistência gigante Efeito hall Magnetização |
description |
We have studied Co/Cu multilayers to understand the effect of the sample’s width on their magnetoresistance (MR). By keeping constant both the length and the thickness and exploring the widths within the range of usual magnetic domain sizes in those nanostructures, we were able to observe effects on the MR curve, as well as infer linked changes in the magnetization process. Associating MR and Planar Hall Effect (PHE) measurements, coupled to an analysis of the MR plots’ symmetry, we were able to establish that, apart from the expected antiferromagnetic coupling, reducing the width forces the magnetization to stay aligned to the current channel, thus inducing more symmetric, closer to model Giant Magnetoresistance (GMR). Also, the sample edges might contribute by adding extra coupling through magnetostatic interaction. The added effects result in a counter-intuitive trend that goes from the near ideal wide samples through intermediate sizes with fairly abrupt changes in MR, and finally to the closer to bell-shaped ideal GMR at narrow widths. |
publishDate |
2016 |
dc.date.accessioned.fl_str_mv |
2016-05-19T02:10:00Z |
dc.date.issued.fl_str_mv |
2016 |
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 |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/141341 |
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0021-8979 |
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000991252 |
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http://hdl.handle.net/10183/141341 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of applied physics. New York. Vol. 119, no. 3 (Jan. 2016), 033902, 5 p. |
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openAccess |
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