Blume–Emery–Griffiths model for mixed spin (1, 5/2) calculated by mean-field approximation

Al Qahoom, Y.; Aharrouch, R.; El Kihel, K.; Saadi, H.; Madani, M.; El Bouziani, M.

doi:10.1140/epjb/s10051-023-00614-y

Eur. Phys. J. B

2023

DOI: 10.1140/epjb/s10051-023-00614-y

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Blume–Emery–Griffiths model for mixed spin (1, 5/2) calculated by mean-field approximation

Y. Al Qahoom,

R. Aharrouch,

K. El Kihel

et al.

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2024

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Cited by 2 publications

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Role of biquadratic exchange on thermodynamic quantities in anisotropic Heisenberg model

Korkmaz,

Mert

2024

Phys. Scr.

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The magnetic and thermodynamic properties of the spin-1 anisotropic Heisenberg system are studied within Oguchi approximation. The system contains both the bilinear and biquadratic exchange interactions between the nearest neighboring spins located on a centered honeycomb lattice. For the positive biquadratic exchange interaction parameters, the phase transition in the Heisenberg case is of both second and first order where there is a discontinuity in the thermodynamic properties at this transition temperature. For some negative biquadratic exchange interaction parameters, in both the Heisenberg and Ising cases, the ferromagnetic state changes in favor of the antiferromagnetic state. The frustrated antiferromagnetic structure created by the biquadratic exchange parameter with negative sign was shown significantly influence the magnetization, quadrupolar moment, internal energy, heat capacity, entropy and free energy of the system, where the system has an oscillating chaotic phase regime. A double peak behavior was observed in the specific heat, with one at the critical temperature and another at a low temperature.

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Role of biquadratic exchange on thermodynamic quantities in anisotropic Heisenberg model

Korkmaz,

Mert

2024

Phys. Scr.

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Critical and reentrant phenomena in the Blume–Emery–Griffiths model with attractive biquadratic interaction

Jalal,

Saadi,

Hasnaoui

et al. 2024

Eur. Phys. J. B

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Blume–Emery–Griffiths model for mixed spin (1, 5/2) calculated by mean-field approximation

Cited by 2 publications

References 44 publications

Role of biquadratic exchange on thermodynamic quantities in anisotropic Heisenberg model

Role of biquadratic exchange on thermodynamic quantities in anisotropic Heisenberg model

Critical and reentrant phenomena in the Blume–Emery–Griffiths model with attractive biquadratic interaction

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