Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling

Detalhes bibliográficos
Autor(a) principal: Bezerra, Claudionor Gomes
Data de Publicação: 2002
Outros Autores: Cottam, Michael G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/45044
Resumo: A study is made of the bulk and surface spin wave modes propagating in magnetic superlattices that are composed of two simple cubic ferromagnetic materials which interact by bilinear and biquadratic exchange couplings at the interfaces. A transfer matrix treatment is employed with the calculations carried out for the exchange dominated regime within the framework of the Heisenberg model and taking into account the random phase approximation. The numerical results obtained show that from a certain value of the ratio R between the biquadratic and interfacial bilinear exchange couplings the surface acoustic modes are suppressed and only the optical modes are present
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spelling Bezerra, Claudionor GomesCottam, Michael G.2021-11-26T17:23:19Z2021-11-26T17:23:19Z2002-05-13BEZERRA, Claudionor Gomes; COTTAM, Michael G.. Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling. Journal Of Applied Physics, [S.L.], v. 91, n. 10, p. 7221, 2002. AIP Publishing. http://dx.doi.org/10.1063/1.1452202. Disponível em: https://aip.scitation.org/doi/abs/10.1063/1.1452202. Acesso em: 26 nov. 2021.https://repositorio.ufrn.br/handle/123456789/4504410.1063/1.1452202American Institute of Physics PublishingSurface spinMagnetic superlatticesBilinear and biquadratic exchangeHeisenberg modelSurface and bulk spin waves in magnetic superlattices with biquadratic exchange couplinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleA study is made of the bulk and surface spin wave modes propagating in magnetic superlattices that are composed of two simple cubic ferromagnetic materials which interact by bilinear and biquadratic exchange couplings at the interfaces. A transfer matrix treatment is employed with the calculations carried out for the exchange dominated regime within the framework of the Heisenberg model and taking into account the random phase approximation. The numerical results obtained show that from a certain value of the ratio R between the biquadratic and interfacial bilinear exchange couplings the surface acoustic modes are suppressed and only the optical modes are presentengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/45044/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52123456789/450442023-02-14 15:37:31.006oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2023-02-14T18:37:31Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
title Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
spellingShingle Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
Bezerra, Claudionor Gomes
Surface spin
Magnetic superlattices
Bilinear and biquadratic exchange
Heisenberg model
title_short Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
title_full Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
title_fullStr Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
title_full_unstemmed Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
title_sort Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling
author Bezerra, Claudionor Gomes
author_facet Bezerra, Claudionor Gomes
Cottam, Michael G.
author_role author
author2 Cottam, Michael G.
author2_role author
dc.contributor.author.fl_str_mv Bezerra, Claudionor Gomes
Cottam, Michael G.
dc.subject.por.fl_str_mv Surface spin
Magnetic superlattices
Bilinear and biquadratic exchange
Heisenberg model
topic Surface spin
Magnetic superlattices
Bilinear and biquadratic exchange
Heisenberg model
description A study is made of the bulk and surface spin wave modes propagating in magnetic superlattices that are composed of two simple cubic ferromagnetic materials which interact by bilinear and biquadratic exchange couplings at the interfaces. A transfer matrix treatment is employed with the calculations carried out for the exchange dominated regime within the framework of the Heisenberg model and taking into account the random phase approximation. The numerical results obtained show that from a certain value of the ratio R between the biquadratic and interfacial bilinear exchange couplings the surface acoustic modes are suppressed and only the optical modes are present
publishDate 2002
dc.date.issued.fl_str_mv 2002-05-13
dc.date.accessioned.fl_str_mv 2021-11-26T17:23:19Z
dc.date.available.fl_str_mv 2021-11-26T17:23:19Z
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 BEZERRA, Claudionor Gomes; COTTAM, Michael G.. Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling. Journal Of Applied Physics, [S.L.], v. 91, n. 10, p. 7221, 2002. AIP Publishing. http://dx.doi.org/10.1063/1.1452202. Disponível em: https://aip.scitation.org/doi/abs/10.1063/1.1452202. Acesso em: 26 nov. 2021.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/45044
dc.identifier.doi.none.fl_str_mv 10.1063/1.1452202
identifier_str_mv BEZERRA, Claudionor Gomes; COTTAM, Michael G.. Surface and bulk spin waves in magnetic superlattices with biquadratic exchange coupling. Journal Of Applied Physics, [S.L.], v. 91, n. 10, p. 7221, 2002. AIP Publishing. http://dx.doi.org/10.1063/1.1452202. Disponível em: https://aip.scitation.org/doi/abs/10.1063/1.1452202. Acesso em: 26 nov. 2021.
10.1063/1.1452202
url https://repositorio.ufrn.br/handle/123456789/45044
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 American Institute of Physics Publishing
publisher.none.fl_str_mv American Institute of Physics Publishing
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Repositório Institucional da UFRN
collection Repositório Institucional da UFRN
bitstream.url.fl_str_mv https://repositorio.ufrn.br/bitstream/123456789/45044/2/license.txt
bitstream.checksum.fl_str_mv e9597aa2854d128fd968be5edc8a28d9
bitstream.checksumAlgorithm.fl_str_mv MD5
repository.name.fl_str_mv Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv
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