Magnetic hysteresis of interface-biased flat iron dots
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/28817 https://doi.org/10.1103/PhysRevB.79.104402 |
Resumo: | We report a theoretical study of the coercivity and bias of iron dots exchange coupled with an antiferromagnetic substrate. We show that flat dots, with height close to the iron exchange length, and lateral dimensions of a few exchange lengths, exhibit large enhancement of coercivity and exchange bias. For small interface field strength the magnetization reversal is nearly a coherent rotation with symmetrical loops. Interface pinning leads to large reduction in coercivity and asymmetrical loops, if the interface field strength is comparable to the value of the iron exchange field. We discuss the impact of geometrical confinement and interface pinning on the magnetization reversal mechanisms. We show that small area dots with height larger than the exchange length display stronger interface effects. |
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Rebouças, G. O. G.Silva, A. S. W. T.Dantas, Ana L.Camley, R. E.Carriço, Artur da Silva2020-04-20T12:08:54Z2020-04-20T12:08:54Z2009-03-04REBOUÇAS, G. O. G.; SILVA, A. S. W. T.; DANTAS, Ana L.; CAMLEY, R. E.; CARRIÇO, A. S. Magnetic hysteresis of interface-biased flat iron dots. Physical Review. B, Condensed Matter and Materials Physics, v. 79, p. 104402, 2009. ISSN 1098-0121. DOI https://doi.org/10.1103/PhysRevB.79.104402. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.79.104402 . Acesso em: 20 abr. 2020.1098-0121 (print), 1550-235X (online)https://repositorio.ufrn.br/jspui/handle/123456789/28817https://doi.org/10.1103/PhysRevB.79.104402Physical review BMagnetic hysteresisInterface-biased flat iron dotsMagnetic hysteresis of interface-biased flat iron dotsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleWe report a theoretical study of the coercivity and bias of iron dots exchange coupled with an antiferromagnetic substrate. We show that flat dots, with height close to the iron exchange length, and lateral dimensions of a few exchange lengths, exhibit large enhancement of coercivity and exchange bias. For small interface field strength the magnetization reversal is nearly a coherent rotation with symmetrical loops. Interface pinning leads to large reduction in coercivity and asymmetrical loops, if the interface field strength is comparable to the value of the iron exchange field. We discuss the impact of geometrical confinement and interface pinning on the magnetization reversal mechanisms. We show that small area dots with height larger than the exchange length display stronger interface effects.engreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessORIGINALMagneticHysteresisOfInterface_Carrico_2009.pdfMagneticHysteresisOfInterface_Carrico_2009.pdfapplication/pdf973950https://repositorio.ufrn.br/bitstream/123456789/28817/1/MagneticHysteresisOfInterface_Carrico_2009.pdfd6b6c7eaa970dd19ca43a3fd8ee2c269MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/28817/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52TEXTMagneticHysteresisOfInterface_Carrico_2009.pdf.txtMagneticHysteresisOfInterface_Carrico_2009.pdf.txtExtracted texttext/plain48728https://repositorio.ufrn.br/bitstream/123456789/28817/3/MagneticHysteresisOfInterface_Carrico_2009.pdf.txtcc04582c60531a08b2e7b88c47d2e123MD53THUMBNAILMagneticHysteresisOfInterface_Carrico_2009.pdf.jpgMagneticHysteresisOfInterface_Carrico_2009.pdf.jpgGenerated Thumbnailimage/jpeg1719https://repositorio.ufrn.br/bitstream/123456789/28817/4/MagneticHysteresisOfInterface_Carrico_2009.pdf.jpg9bc82aea130aff4767502a3234862613MD54123456789/288172020-04-26 04:30:35.215oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-04-26T07:30:35Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Magnetic hysteresis of interface-biased flat iron dots |
title |
Magnetic hysteresis of interface-biased flat iron dots |
spellingShingle |
Magnetic hysteresis of interface-biased flat iron dots Rebouças, G. O. G. Magnetic hysteresis Interface-biased flat iron dots |
title_short |
Magnetic hysteresis of interface-biased flat iron dots |
title_full |
Magnetic hysteresis of interface-biased flat iron dots |
title_fullStr |
Magnetic hysteresis of interface-biased flat iron dots |
title_full_unstemmed |
Magnetic hysteresis of interface-biased flat iron dots |
title_sort |
Magnetic hysteresis of interface-biased flat iron dots |
author |
Rebouças, G. O. G. |
author_facet |
Rebouças, G. O. G. Silva, A. S. W. T. Dantas, Ana L. Camley, R. E. Carriço, Artur da Silva |
author_role |
author |
author2 |
Silva, A. S. W. T. Dantas, Ana L. Camley, R. E. Carriço, Artur da Silva |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Rebouças, G. O. G. Silva, A. S. W. T. Dantas, Ana L. Camley, R. E. Carriço, Artur da Silva |
dc.subject.por.fl_str_mv |
Magnetic hysteresis Interface-biased flat iron dots |
topic |
Magnetic hysteresis Interface-biased flat iron dots |
description |
We report a theoretical study of the coercivity and bias of iron dots exchange coupled with an antiferromagnetic substrate. We show that flat dots, with height close to the iron exchange length, and lateral dimensions of a few exchange lengths, exhibit large enhancement of coercivity and exchange bias. For small interface field strength the magnetization reversal is nearly a coherent rotation with symmetrical loops. Interface pinning leads to large reduction in coercivity and asymmetrical loops, if the interface field strength is comparable to the value of the iron exchange field. We discuss the impact of geometrical confinement and interface pinning on the magnetization reversal mechanisms. We show that small area dots with height larger than the exchange length display stronger interface effects. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-03-04 |
dc.date.accessioned.fl_str_mv |
2020-04-20T12:08:54Z |
dc.date.available.fl_str_mv |
2020-04-20T12:08:54Z |
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 |
REBOUÇAS, G. O. G.; SILVA, A. S. W. T.; DANTAS, Ana L.; CAMLEY, R. E.; CARRIÇO, A. S. Magnetic hysteresis of interface-biased flat iron dots. Physical Review. B, Condensed Matter and Materials Physics, v. 79, p. 104402, 2009. ISSN 1098-0121. DOI https://doi.org/10.1103/PhysRevB.79.104402. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.79.104402 . Acesso em: 20 abr. 2020. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/28817 |
dc.identifier.issn.none.fl_str_mv |
1098-0121 (print), 1550-235X (online) |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.1103/PhysRevB.79.104402 |
identifier_str_mv |
REBOUÇAS, G. O. G.; SILVA, A. S. W. T.; DANTAS, Ana L.; CAMLEY, R. E.; CARRIÇO, A. S. Magnetic hysteresis of interface-biased flat iron dots. Physical Review. B, Condensed Matter and Materials Physics, v. 79, p. 104402, 2009. ISSN 1098-0121. DOI https://doi.org/10.1103/PhysRevB.79.104402. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.79.104402 . Acesso em: 20 abr. 2020. 1098-0121 (print), 1550-235X (online) |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/28817 https://doi.org/10.1103/PhysRevB.79.104402 |
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 |
Physical review B |
publisher.none.fl_str_mv |
Physical review B |
dc.source.none.fl_str_mv |
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UFRN |
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UFRN |
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Repositório Institucional da UFRN |
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