Thermodynamics of the Exactly Solvable Spin-Electron Tetrahedral Chain

• Authors: L. Gálisová
• Languages of publication: EN

Abstracts

EN

An exactly solvable spin-electron tetrahedral chain, where the Ising spins localized at nodal lattice sites regularly alternate with three equivalent lattice sites available for one mobile electron is considered. The system with ferromagnetic interaction between the Ising spins and electrons exhibits an enhanced magnetocaloric effect in the limit H/|J| → 0 when the entropy is very small, whereas the system with antiferromagnetic interaction between the Ising spins and electrons exhibits an enhanced magnetocaloric effect around the field H/J=1 when the entropy is sufficiently close to the value S/2N = ln[(1+√5)/2]. We study the thermodynamics of the system in these field regions.

Keywords

EN

05.70.-a; 75.10.Pq

Discipline

• 75.10.Pq: Spin chain models
• 05.70.-a: Thermodynamics(see also section 64 Equations of state, phase equilibria, and phase transitions, and section 65 Thermal properties of condensed matter; for chemical thermodynamics, see 82.60.-s; for thermodynamics of plasmas, see 52.25.Kn; for thermodynamic properties of quantum fluids, see 67.25.bd, and 67.30.ef; for thermodynamics of nanoparticles, see 82.60.Qr, and 65.80.-g; for thermodynamic processes in astrophysics, see 95.30.Tg; for thermodynamics in volcanology, see 91.40.Pc)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 2
• Pages: 156-158

Dates

published

2015-08

Contributors

author

L. Gálisová

• Department of Applied Mathematics and Informatics, Faculty of Mechanical Engineering, Technical University in Košice, Letná 9, 042 00 Košice, Slovak Republic

References

• [1] M. Rojas, S.M. de Souza, O. Rojas, arXiv: 1212.5552
• [2] D. Antonosyan, S. Bellucci, V. Ohanyan, Phys. Rev. B 79, 014432 (2009), doi: 10.1103/PhysRevB.79.014432
• [3] L. Gálisová, J. Strečka, Acta Phys. Pol. A 127, 216 (2015), doi: 10.12693/AphysPolA.127.216
• [4] M.E. Fisher, Phys. Rev. 113, 969 (1959), doi: 10.1103/PhysRev.113.969

Identifiers

DOI

10.12693/APhysPolA.128.156