Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system
We used mean-field theory based on the Bogoliubov inequality for the Gibbs free energy to examine the magnetic properties of a mixed spin-5/2 and spin-7/2 Blume-Capel ferrimagnetic system. The thermal behaviours of the system magnetization are classified according to the extended Néel nomenclature....
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Institute for Condensed Matter Physics
2019-09-01
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| Series: | Condensed Matter Physics |
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| Online Access: | https://doi.org/10.5488/CMP.22.33601 |
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doaj-44e241bf3a0c4474b352ff019ebe19862020-11-25T02:44:11ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2224-90792019-09-012233360110.5488/CMP.22.33601Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system M. KarimouR.A. YessoufouG. Dimitri NgantsoF. HontinfindeE. AlbayrakWe used mean-field theory based on the Bogoliubov inequality for the Gibbs free energy to examine the magnetic properties of a mixed spin-5/2 and spin-7/2 Blume-Capel ferrimagnetic system. The thermal behaviours of the system magnetization are classified according to the extended Néel nomenclature. The system exhibits compensation phenomena where a complete cancellation of sublattice magnetizations is observed below the critical temperature. Temperature-dependent phase diagrams are constructed for the case of unequal sublattice crystal field interactions. Under appropriate conditions, our calculations reveal first-order transitions in addition to second-order ones previously observed in Monte Carlo simulations. https://doi.org/10.5488/CMP.22.33601mean-field theorymixed-spin systemmagnetizationcompensation temperaturephase transitions |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
M. Karimou R.A. Yessoufou G. Dimitri Ngantso F. Hontinfinde E. Albayrak |
| spellingShingle |
M. Karimou R.A. Yessoufou G. Dimitri Ngantso F. Hontinfinde E. Albayrak Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system Condensed Matter Physics mean-field theory mixed-spin system magnetization compensation temperature phase transitions |
| author_facet |
M. Karimou R.A. Yessoufou G. Dimitri Ngantso F. Hontinfinde E. Albayrak |
| author_sort |
M. Karimou |
| title |
Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system |
| title_short |
Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system |
| title_full |
Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system |
| title_fullStr |
Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system |
| title_full_unstemmed |
Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system |
| title_sort |
phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 ising system |
| publisher |
Institute for Condensed Matter Physics |
| series |
Condensed Matter Physics |
| issn |
1607-324X 2224-9079 |
| publishDate |
2019-09-01 |
| description |
We used mean-field theory based on the Bogoliubov inequality for the Gibbs free energy to examine the magnetic properties of a mixed spin-5/2 and spin-7/2 Blume-Capel ferrimagnetic system. The thermal behaviours of the system magnetization are classified according to the extended Néel nomenclature. The system exhibits compensation phenomena where a complete cancellation of sublattice magnetizations is observed below the critical temperature. Temperature-dependent phase diagrams are constructed for the case of unequal sublattice crystal field interactions. Under appropriate conditions, our calculations reveal first-order transitions in addition to second-order ones previously observed in Monte Carlo simulations. |
| topic |
mean-field theory mixed-spin system magnetization compensation temperature phase transitions |
| url |
https://doi.org/10.5488/CMP.22.33601 |
| work_keys_str_mv |
AT mkarimou phasediagramsandcriticalbehavioursofthemixedspin52andspin72isingsystem AT rayessoufou phasediagramsandcriticalbehavioursofthemixedspin52andspin72isingsystem AT gdimitringantso phasediagramsandcriticalbehavioursofthemixedspin52andspin72isingsystem AT fhontinfinde phasediagramsandcriticalbehavioursofthemixedspin52andspin72isingsystem AT ealbayrak phasediagramsandcriticalbehavioursofthemixedspin52andspin72isingsystem |
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1724766915356786688 |