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2017 | 131 | 4 | 1021-1023
Article title

Rise and Fall of Reentrant Phase Transitions in a Coupled Spin-Electron Model on a Doubly Decorated Honeycomb Lattice

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EN
Abstracts
EN
Phase diagrams and spontaneous magnetization are rigorously calculated for a coupled spin-electron model on a doubly decorated honeycomb lattice, which accounts for a quantum-mechanical hopping of the mobile electrons on decorating sites, the nearest-neighbor Ising coupling between mobile electrons and localized spins, as well as the further-neighbor Ising coupling between the localized spins placed on nodal sites. The spontaneously ordered ferromagnetic phase, spontaneously ordered antiferromagnetic phase and disordered paramagnetic phase emerge in a phase diagram depending on an electron filling of the decorating sites, a relative size of the hopping term and both considered coupling constants. It is evidenced that a nature and size of the further-neighbor Ising coupling between the localized spins basically influences rise and fall of reentrant transitions close to a phase boundary between the paramagnetic phase and both spontaneously ordered phases.
Keywords
Contributors
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia
References
  • [1] T. Narayanan, A. Kumar, Phys. Rep. 249, 135 (1994), doi: 10.1016/0370-1573(94)90015-9
  • [2] F.F. Doria, M.S.S. Pereira, M.L. Lyra, J. Magn. Magn. Mater. 368, 98 (2014), doi: 10.1016/j.jmmm.2014.05.022
  • [3] J. Strečka, H. Čenčariková, M.L. Lyra, Phys. Lett. A 379, 2915 (2015), doi: 10.1016/j.physleta.2015.08.027
  • [4] H. Čenčariková, J. Strečka, M.L. Lyra, J. Magn. Magn. Mater. 401, 1106 (2016), doi: 10.1016/j.jmmm.2015.11.018
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n4134kz
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