Thermal properties of the mixed spin-1 and spin-3/2 Ising ferrimagnetic system with two different random single-ion anisotropies

Pereira, João Ricardo Vallim; Tunes, T.M.; Arruda, A.S. de; Godoy, M.

doi:10.1016/j.physa.2018.02.085

Cited by 9 publications

(3 citation statements)

References 40 publications

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“…Thus, in order to study the phase transition and the magnetic properties of the Fe 1-x S like we use the mixed spin Ising model [34][35][36][37][38][39][40] with crystal field parameter as an appropriate energy. Then our system can be described by the following Hamiltonian:…”

Section: Ii2 the Hamiltonianmentioning

confidence: 99%

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound

et al. 2020

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The structural, electronic and magnetic properties of Fe 7 S 8 material have been studied within the framework of the ab-initio calculations, the mean field approximation (MFA) and Monte Carlo simulation (MCS). Our study shows that two forms of the iron atoms, Fe 2+ with spin S=2, and Fe 3+ with spin =5/2 are the most probable configurations. A mixed Ising model with ferromagnetic spin coupling between Fe 2+ and Fe 3+ ions and between Fe 3+ and Fe 3+ ions, and with antiferromagnetic spin coupling between Fe 2+ ions of adjacent layers has been used to study the magnetic properties of this compound. We demonstrated that the magnetic phase transition can be either of the first or of the second order, depending on the value of the exchange interaction and crystal field. The presence of vacancies in every second iron layer leads to incomplete cancellation of magnetic moments, hence to the emergence of the ferrimagnetism. Anomalies in the magnetization behavior have been found and compared with the experimental results.

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Section: Ii2 the Hamiltonianmentioning

confidence: 99%

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound

et al. 2020

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“…There are a lot of studies carried out with different combinations of spins, such as exact solutions [8][9][10][11] for the simplest combination spin-1/2 and 1. Moreover, the mixed-spin Ising model has been studied by different approaches such as mean-field approximation [12][13][14][15][16][17], effective-field theory [18][19][20][21], renormalization group [22], numerical Monte Carlo simulations [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Random-anisotropy mixed-spin Ising on a triangular lattice

Santana¹,

Arruda²,

Godoy³

2023

Condens. Matter Phys.

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We have studied the mixed spin-1/2 and 1 Ising ferrimagnetic system with a random anisotropy on a triangular lattice with three interpenetrating sublattices A, B, and C. The spins on the sublattices are represented by σA (states ±1/2), σB (states ±1/2), and SC (states ±1, 0). We have performed Monte Carlo simulations to obtain the phase diagram temperature kBT/|J| versus the strength of the random anisotropy D/|J|. The phase boundary between two ferrimagnetic FR1 and FR2 phases at lower temperatures are always first-order for p < 0.25 and second-order phase transition between the FR1, FR2 and the paramagnetic P phases. On the other hand, for values of p ⪆ 0.5, the phase diagram presents only second-order phase transition lines.

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“…We have also looked for occurrences of compensation temperatures by using Monte Carlo simulations. Thus, we have inspired in the work of Pereira et al [35] who performed Monte Carlo simulations to study a mixed spin-1 and spin-3/2 Ising ferrimagnetic system on a square lattice with two different random single-ion anisotropies.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram of the mixed-spin (1,3/2) Ising ferrimagnetic system with two different anisotropies

da Silva,

de Arruda,

Godoy

2020

Preprint

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In this work, we have performed Monte Carlo simulations to study phase transitions in a mixed spin-1 and spin-3/2 Ising ferrimagnetic system on the square and cubic lattices and with two different single-ion anisotropies. This lattice is divided in two interpenetrating sublattices with spins S A = 1 (states ±1 and 0) on the sublattice A and S B = 3/2 (states ±3/2, ±1/2) on the sublattice B. We have used single-ion anisotropies D A and D B acting on the sites of the sublattice A and B, receptively. We have determined the phase diagrams of the model in the temperature T versus the single-ion anisotropies strength D A and D B plane and shown that the system exhibits both second-and first-order phase transitions. We also have shown that this system displays compensation points for some values of the anisotropies.

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Thermal properties of the mixed spin-1 and spin-3/2 Ising ferrimagnetic system with two different random single-ion anisotropies

Cited by 9 publications

References 40 publications

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound

Random-anisotropy mixed-spin Ising on a triangular lattice

Phase diagram of the mixed-spin (1,3/2) Ising ferrimagnetic system with two different anisotropies

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Thermal properties of the mixed spin-1 and spin-3/2 Ising ferrimagnetic system with two different random single-ion anisotropies

Cited by 9 publications

References 40 publications

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe7S8 compound

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe7S8 compound

Random-anisotropy mixed-spin Ising on a triangular lattice

Phase diagram of the mixed-spin (1,3/2) Ising ferrimagnetic system with two different anisotropies

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Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound

Mean field theory and Monte Carlo simulation of phase transitions and magnetic properties of a tridimensional Fe₇S₈ compound