An effective-field study of Ising metamagnet in an external field

Geng, Jia-Jia; Wei, Guozhu; Miao, Hailing

doi:10.1016/j.jmmm.2007.10.006

Cited by 11 publications

(5 citation statements)

References 24 publications

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“…Instead, as in Ref. [22], we calculate the corresponding Gibbs free energies of the various solutions of Eqs. (8a) and (8b) for the pair (m,m s ) numerically, via comparing which first-order transition point.…”

Section: Effective-field Theorymentioning

confidence: 99%

“…It is obvious that the field can be decomposed into the longitudinal (perpendicular to the plane) and transverse (parallel to the plane) fields. In the previous work, we have studied Ising metamagnet at finite temperature with longitudinal crystal field by using EFT [22] and Ising metamagnet at finite temperature in a mixed longitudinal and transverse magnetic fields, respectively by using MFT [23]. In this work, we will investigate the phase diagrams of Ising metamagnet at finite temperature in a mixed longitudinal and transverse magnetic field by using EFT.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties of Ising metamagnet in both external longitudinal and transverse fields

Geng

Wei

2009

Journal of Magnetism and Magnetic Materials

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Section: Effective-field Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic properties of Ising metamagnet in both external longitudinal and transverse fields

Geng

Wei

2009

Journal of Magnetism and Magnetic Materials

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“…When the strength of the field is increased starting from zero, its phase transition point separating the ordered and disordered phases from each other gets to shift to the lower temperature region. From the theoretical point of view, thermal and magnetic phase transition properties of different kinds of metamagnetic systems have been studied by a wide variety of techniques such as Mean-Field Theory [1][2][3][4][5][6][7][8], Effective-Field Theory [9][10][11][12][13], Monte-Carlo simulation method [14][15][16][17][18][19][20][21][22][23][24][25], and High Temperature Series Expansion method [26,27]. The studies done so far show us that metamagnetic systems can include multicritical points such as tricritical point, bicritical end point and also critical end point depending on the ratio between these ferromagnetic and antiferromagnetic interactions.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo study of the phase diagram of layered XY antiferromagnet

Acharyya¹,

Vatansever²

2021

Preprint

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The three dimensional XY model is considered in the presence of uniform magnetic field applied in the X-direction. The nearest neighbour intraplanar interaction is considered ferromagnetic and the interplanar nearest neighbour interaction is considered antiferromagnetic. Starting from high temperature initial random spin configuration the equilibrium phase of the system at any finite temperature was achieved by cooling the system using Monte Carlo single spin flip Metropolis algorithm with random updating rule. The components of total magnetisation and the sublattice magnetisations were calculated. The variance of antiferromagnetic order parameter and the specific heat were calculated. In a specific range of relative strengths of interactions (antiferromagnetic/ferromagnetic), the system shows multiple equilibrium phase transitions as observed from the double peaks of the specific heat plotted against the temperature. The phase diagrams (in the field-temperature plane) were obtained for different relative interaction strength. The two boundaries meet at some bicritical point. The bicritical point was found to move towards higher values of temperature and field as the strength of relative interaction increases.

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“…[1][2][3][4] The equilibrium properties of Ising metamagnets have been investigated in detail. [5][6][7][8][9][10][11][12][13][14][15][16][17] On the other hand, the dynamic magnetic behavior of the metamagnetic systems has been a subject of interest for a long time. Yang [18] studied the kinetic spin-1/2 metamagnetic Ising system by using Glauber dynamics.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium behavior of the kinetic metamagnetic spin-5/2 Blume—Capel model

Temizer¹

2014

Chinese Phys. B

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The dynamic magnetic behavior of the kinetic metamagnetic spin-5/2 Blume-Capel model is examined, within a mean-field approach, under a time-dependent oscillating magnetic field. To describe the kinetics of the system, Glaubertype stochastic dynamics has been utilized. The mean-field dynamic equations of the model are obtained from the Master equation. Firstly, these dynamic equations are solved to find the phases in the system. Then, the dynamic phase transition temperatures are obtained by investigating the thermal behavior of dynamic sublattice magnetizations. Moreover, from this investigation, the nature of the phase transitions (first-or second-order) is characterized. Finally, the dynamic phase diagrams are plotted in five different planes. It is found that the dynamic phase diagrams contain the paramagnetic (P), antiferromagnetic (AF 5/2 , AF 3/2 , AF 1/2 ) phases and five different mixed phases. The phase diagrams also display many dynamic critical points, such as tricritical point, triple point, quadruple point, double critical end point and separating point.

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An effective-field study of Ising metamagnet in an external field

Cited by 11 publications

References 24 publications

Magnetic properties of Ising metamagnet in both external longitudinal and transverse fields

Magnetic properties of Ising metamagnet in both external longitudinal and transverse fields

Monte Carlo study of the phase diagram of layered XY antiferromagnet

Nonequilibrium behavior of the kinetic metamagnetic spin-5/2 Blume—Capel model

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