Compensation temperature of the mixed-spin ising model on the hexagonal lattice
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000300010 |
Resumo: | We studied a layered mixed-spin Ising model, with spins s = 1/2 and S = 1, distributed on the sites of a hexagonal lattice. For this spin arrangement, any spin at one lattice site has two nearest-neigbor spins of the same type, and four of the other type. We assumed that the exchange interaction between spins s and S is antiferromagnetic, with the value J1. J2 is the exchange interaction between two nearest neighbor s spins, and J3 is the coupling between two nearest neighbor S spins. We also considered a single-ion crystal-field contribution D to the S sites. We performed mean-field calculations and Monte Carlo simulations to determine the compensation point of the model. We have shown that a compensation point can be present for any positive value of D. We have also found a negative lower bound for D, below which a compensation point can not appear. For each value of D, we determined the range of values of the J2 and J3 couplings for which a compensation point is realizable. |
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Brazilian Journal of Physics |
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Compensation temperature of the mixed-spin ising model on the hexagonal latticeWe studied a layered mixed-spin Ising model, with spins s = 1/2 and S = 1, distributed on the sites of a hexagonal lattice. For this spin arrangement, any spin at one lattice site has two nearest-neigbor spins of the same type, and four of the other type. We assumed that the exchange interaction between spins s and S is antiferromagnetic, with the value J1. J2 is the exchange interaction between two nearest neighbor s spins, and J3 is the coupling between two nearest neighbor S spins. We also considered a single-ion crystal-field contribution D to the S sites. We performed mean-field calculations and Monte Carlo simulations to determine the compensation point of the model. We have shown that a compensation point can be present for any positive value of D. We have also found a negative lower bound for D, below which a compensation point can not appear. For each value of D, we determined the range of values of the J2 and J3 couplings for which a compensation point is realizable.Sociedade Brasileira de Física2004-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000300010Brazilian Journal of Physics v.34 n.2a 2004reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332004000300010info:eu-repo/semantics/openAccessFigueiredo,W.Godoy,M.Leite,V. S.eng2004-09-01T00:00:00Zoai:scielo:S0103-97332004000300010Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2004-09-01T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
title |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
spellingShingle |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice Figueiredo,W. |
title_short |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
title_full |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
title_fullStr |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
title_full_unstemmed |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
title_sort |
Compensation temperature of the mixed-spin ising model on the hexagonal lattice |
author |
Figueiredo,W. |
author_facet |
Figueiredo,W. Godoy,M. Leite,V. S. |
author_role |
author |
author2 |
Godoy,M. Leite,V. S. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Figueiredo,W. Godoy,M. Leite,V. S. |
description |
We studied a layered mixed-spin Ising model, with spins s = 1/2 and S = 1, distributed on the sites of a hexagonal lattice. For this spin arrangement, any spin at one lattice site has two nearest-neigbor spins of the same type, and four of the other type. We assumed that the exchange interaction between spins s and S is antiferromagnetic, with the value J1. J2 is the exchange interaction between two nearest neighbor s spins, and J3 is the coupling between two nearest neighbor S spins. We also considered a single-ion crystal-field contribution D to the S sites. We performed mean-field calculations and Monte Carlo simulations to determine the compensation point of the model. We have shown that a compensation point can be present for any positive value of D. We have also found a negative lower bound for D, below which a compensation point can not appear. For each value of D, we determined the range of values of the J2 and J3 couplings for which a compensation point is realizable. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000300010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000300010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332004000300010 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.34 n.2a 2004 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734860778340352 |