Giant magnetocaloric effect of thin Ho films

Detalhes bibliográficos
Autor(a) principal: Carriço, Artur da Silva
Data de Publicação: 2011
Outros Autores: Medeiros Filho, F. C., Mello, V. D., Dantas, A. L., Salles, F. H. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/28680
https://doi.org/10.1063/1.3549566
Resumo: We report a theoretical study of the impact of finite size on the magnetocaloric effect (MCE) of thin Ho films. For strong external field strengths, the adiabatic temperature change ΔTad is comparable to the value found in bulk Ho, reaching about 12 K for an external field strength change ΔH = 50 kOe. For thicknesses below the helix period, there is a large enhancement. In this thickness range, the helical state does not form, leading to a giant MCE reaching ΔT/ΔH = 6.5 K/T for ΔH = 2 kOe.
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spelling Carriço, Artur da SilvaMedeiros Filho, F. C.Mello, V. D.Dantas, A. L.Salles, F. H. S.2020-03-30T13:19:47Z2020-03-30T13:19:47Z2011-03-24MEDEIROS FILHO, F. C.; MELLO, V. D.; DANTAS, A. L.; SALES, F. H. S. ; CARRIÇO, Artur da Silva. Giant magnetocaloric effect of thin Ho films. Journal of Applied Physics, v. 109, n. 7, p. 07A914, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3549566 . Acesso em: 27. mar. 2020.https://repositorio.ufrn.br/jspui/handle/123456789/28680https://doi.org/10.1063/1.3549566American Institute of PhysicsMagnetocaloricGiant magnetocaloric effect of thin Ho filmsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleWe report a theoretical study of the impact of finite size on the magnetocaloric effect (MCE) of thin Ho films. For strong external field strengths, the adiabatic temperature change ΔTad is comparable to the value found in bulk Ho, reaching about 12 K for an external field strength change ΔH = 50 kOe. For thicknesses below the helix period, there is a large enhancement. In this thickness range, the helical state does not form, leading to a giant MCE reaching ΔT/ΔH = 6.5 K/T for ΔH = 2 kOe.engreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessORIGINALGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdfGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdfapplication/pdf734038https://repositorio.ufrn.br/bitstream/123456789/28680/1/GiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdfadc71d208e98f16834a336097a31a404MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/28680/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52TEXTGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.txtGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.txtExtracted texttext/plain16002https://repositorio.ufrn.br/bitstream/123456789/28680/3/GiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.txt36a951f4139991dd5b2b539572498658MD53THUMBNAILGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.jpgGiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.jpgGenerated Thumbnailimage/jpeg1737https://repositorio.ufrn.br/bitstream/123456789/28680/4/GiantMagnetocaloricEffectOfThinHoFilms_Carrico_2011.pdf.jpgf2ad280c43c691915e31759e37a83633MD54123456789/286802020-05-05 01:09:13.63oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-05-05T04:09:13Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Giant magnetocaloric effect of thin Ho films
title Giant magnetocaloric effect of thin Ho films
spellingShingle Giant magnetocaloric effect of thin Ho films
Carriço, Artur da Silva
Magnetocaloric
title_short Giant magnetocaloric effect of thin Ho films
title_full Giant magnetocaloric effect of thin Ho films
title_fullStr Giant magnetocaloric effect of thin Ho films
title_full_unstemmed Giant magnetocaloric effect of thin Ho films
title_sort Giant magnetocaloric effect of thin Ho films
author Carriço, Artur da Silva
author_facet Carriço, Artur da Silva
Medeiros Filho, F. C.
Mello, V. D.
Dantas, A. L.
Salles, F. H. S.
author_role author
author2 Medeiros Filho, F. C.
Mello, V. D.
Dantas, A. L.
Salles, F. H. S.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Carriço, Artur da Silva
Medeiros Filho, F. C.
Mello, V. D.
Dantas, A. L.
Salles, F. H. S.
dc.subject.por.fl_str_mv Magnetocaloric
topic Magnetocaloric
description We report a theoretical study of the impact of finite size on the magnetocaloric effect (MCE) of thin Ho films. For strong external field strengths, the adiabatic temperature change ΔTad is comparable to the value found in bulk Ho, reaching about 12 K for an external field strength change ΔH = 50 kOe. For thicknesses below the helix period, there is a large enhancement. In this thickness range, the helical state does not form, leading to a giant MCE reaching ΔT/ΔH = 6.5 K/T for ΔH = 2 kOe.
publishDate 2011
dc.date.issued.fl_str_mv 2011-03-24
dc.date.accessioned.fl_str_mv 2020-03-30T13:19:47Z
dc.date.available.fl_str_mv 2020-03-30T13:19:47Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.citation.fl_str_mv MEDEIROS FILHO, F. C.; MELLO, V. D.; DANTAS, A. L.; SALES, F. H. S. ; CARRIÇO, Artur da Silva. Giant magnetocaloric effect of thin Ho films. Journal of Applied Physics, v. 109, n. 7, p. 07A914, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3549566 . Acesso em: 27. mar. 2020.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/28680
dc.identifier.doi.none.fl_str_mv https://doi.org/10.1063/1.3549566
identifier_str_mv MEDEIROS FILHO, F. C.; MELLO, V. D.; DANTAS, A. L.; SALES, F. H. S. ; CARRIÇO, Artur da Silva. Giant magnetocaloric effect of thin Ho films. Journal of Applied Physics, v. 109, n. 7, p. 07A914, 2011. Disponível em: https://aip.scitation.org/doi/10.1063/1.3549566 . Acesso em: 27. mar. 2020.
url https://repositorio.ufrn.br/jspui/handle/123456789/28680
https://doi.org/10.1063/1.3549566
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dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
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