Modeling two-dimensional magnetic domain patterns
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/103846 |
Resumo: | Two-dimensional magnetic garnets exhibit complex and fascinating magnetic domain structures, like stripes, labyrinths, cells, and mixed states of stripes and cells. These patterns do change in a reversible way when the intensity of an externally applied magnetic field is varied. The main objective of this contribution is to present the results of a model that yields a rich pattern structure that closely resembles what is observed experimentally. Our model is a generalized two-dimensional Ising-like spin-1 Hamiltonian with long-range interactions, which also incorporates anisotropy and Zeeman terms. The model is studied numerically by means of Monte Carlo simulations. Changing the model parameters, stripes, labyrinth, and/or cellular domain structures are generated. For a variety of cases we display the patterns and determine the average size of the domains, the ordering transition temperature, specific heat, magnetic susceptibility, and hysteresis cycle. Finally, we examine the reversibility of the pattern evolution under variations of the applied magnetic field. The results we obtain are in good qualitative agreement with experiment. |
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Iglesias, Jose RobertoGoncalves, SebastianNagel, Oscar AmadeoKiwi, Miguel2014-09-26T02:10:50Z20021098-0121http://hdl.handle.net/10183/103846000309755Two-dimensional magnetic garnets exhibit complex and fascinating magnetic domain structures, like stripes, labyrinths, cells, and mixed states of stripes and cells. These patterns do change in a reversible way when the intensity of an externally applied magnetic field is varied. The main objective of this contribution is to present the results of a model that yields a rich pattern structure that closely resembles what is observed experimentally. Our model is a generalized two-dimensional Ising-like spin-1 Hamiltonian with long-range interactions, which also incorporates anisotropy and Zeeman terms. The model is studied numerically by means of Monte Carlo simulations. Changing the model parameters, stripes, labyrinth, and/or cellular domain structures are generated. For a variety of cases we display the patterns and determine the average size of the domains, the ordering transition temperature, specific heat, magnetic susceptibility, and hysteresis cycle. Finally, we examine the reversibility of the pattern evolution under variations of the applied magnetic field. The results we obtain are in good qualitative agreement with experiment.application/pdfengPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 65, no. 6 (Feb. 2002), 064447 8p.FísicaModeling two-dimensional magnetic domain patternsEstrangeiroinfo: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:UFRGSORIGINAL000309755.pdf000309755.pdfTexto completo (inglês)application/pdf1609944http://www.lume.ufrgs.br/bitstream/10183/103846/1/000309755.pdfeef61f65e954151587c175748c415a0eMD51TEXT000309755.pdf.txt000309755.pdf.txtExtracted Texttext/plain32233http://www.lume.ufrgs.br/bitstream/10183/103846/2/000309755.pdf.txt8b29e9a62aa85cacbabb8e274dae93c5MD52THUMBNAIL000309755.pdf.jpg000309755.pdf.jpgGenerated Thumbnailimage/jpeg2006http://www.lume.ufrgs.br/bitstream/10183/103846/3/000309755.pdf.jpg0d35b418525a03b2f050a355928c13a4MD5310183/1038462024-05-19 05:46:13.849145oai:www.lume.ufrgs.br:10183/103846Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-05-19T08:46:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Modeling two-dimensional magnetic domain patterns |
title |
Modeling two-dimensional magnetic domain patterns |
spellingShingle |
Modeling two-dimensional magnetic domain patterns Iglesias, Jose Roberto Física |
title_short |
Modeling two-dimensional magnetic domain patterns |
title_full |
Modeling two-dimensional magnetic domain patterns |
title_fullStr |
Modeling two-dimensional magnetic domain patterns |
title_full_unstemmed |
Modeling two-dimensional magnetic domain patterns |
title_sort |
Modeling two-dimensional magnetic domain patterns |
author |
Iglesias, Jose Roberto |
author_facet |
Iglesias, Jose Roberto Goncalves, Sebastian Nagel, Oscar Amadeo Kiwi, Miguel |
author_role |
author |
author2 |
Goncalves, Sebastian Nagel, Oscar Amadeo Kiwi, Miguel |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Iglesias, Jose Roberto Goncalves, Sebastian Nagel, Oscar Amadeo Kiwi, Miguel |
dc.subject.por.fl_str_mv |
Física |
topic |
Física |
description |
Two-dimensional magnetic garnets exhibit complex and fascinating magnetic domain structures, like stripes, labyrinths, cells, and mixed states of stripes and cells. These patterns do change in a reversible way when the intensity of an externally applied magnetic field is varied. The main objective of this contribution is to present the results of a model that yields a rich pattern structure that closely resembles what is observed experimentally. Our model is a generalized two-dimensional Ising-like spin-1 Hamiltonian with long-range interactions, which also incorporates anisotropy and Zeeman terms. The model is studied numerically by means of Monte Carlo simulations. Changing the model parameters, stripes, labyrinth, and/or cellular domain structures are generated. For a variety of cases we display the patterns and determine the average size of the domains, the ordering transition temperature, specific heat, magnetic susceptibility, and hysteresis cycle. Finally, we examine the reversibility of the pattern evolution under variations of the applied magnetic field. The results we obtain are in good qualitative agreement with experiment. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-09-26T02:10:50Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
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article |
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http://hdl.handle.net/10183/103846 |
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1098-0121 |
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000309755 |
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1098-0121 000309755 |
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http://hdl.handle.net/10183/103846 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. Woodbury. Vol. 65, no. 6 (Feb. 2002), 064447 8p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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