Effects of the double Gaussian random field distribution on the phase diagrams and hysteresis characteristics of the magnetic binary alloys

Karakoyun, Gülşen; Akıncı, Ümit

doi:10.1016/j.physb.2019.411870

Cited by 7 publications

(5 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the crystal field parameter takes large negative values, critical temperature values converge at one point, and concentration is no longer important for certain temperature values. We can say that, the behaviors of the critical temperatures obtained in this case are compatible with the mixed [22,26] and binary alloy systems [50][51][52].…”

Section: Half Integer -Half Integer Spin Modelsupporting

confidence: 73%

“…Perturbation theory was also used for extended spin S model [45]. On the other hand, the system consisting of different spin values such as spin-1/2-1 has been examined by several methods such as EFT for amophous ferrimagnetic [46][47][48] and ferromagnetic [49][50][51][52] binary alloys; MFT [53][54][55] and MC [56] methods. Spin-1/2-3/2 model has been inspected by use of MFT [54,57] and also within EFT [58,59].…”

Section: Introductionmentioning

confidence: 99%

“…[50][51][52].If we choose spin values of the system as S A = 3/2, S B = 2 (Fig 5 (b)), the critical temperature increases for larger values of crystal field, whereas it decreases for negative large crystal field parameters. When all of the lattice sites consist of type-B atoms it displays a larger TCP value (compare Fig 5 (a) and (b)).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Phase Diagrams of Generalized Spin-S Magnetic Binary Alloys

Karakoyun,

Akıncı

2020

Preprint

Self Cite

View full text Add to dashboard Cite

Critical properties of the generalized spin-S magnetic binary alloys represented by A c B 1−c have been investigated within the framework of EFT. By inspecting the evolution of the phase diagrams with the concentration for several spin values, general results have been obtained. Obtained results cover the results obtained for special cases in the literature. Type of the transition (first/second order), as well as the presence of the tricritical point have been determined for general spin models. It has also been shown that, the same critical concentration value exist in the system, regardless of the spin value for binary alloy consist of half integer-integer spin alloy.

show abstract

Section: Half Integer -Half Integer Spin Modelsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase Diagrams of Generalized Spin-S Magnetic Binary Alloys

Karakoyun,

Akıncı

2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…For instance, the binary alloy system consisting of spin-1/2 and spin-1 could exhibit double hysteresis behavior in a concentration 0 < c < 0.557 range within the framework of EFT [5]. The effects of the symmetric double Gaussian random field distribution on this system has also been investigated by use of EFT, and double hysteresis character has been obtained depending on Hamiltonian parameters [35]. Hysteresis behavior of quenched disordered binary alloy cylindrical nanowire consisting of the same spin set as the previous model has been examined by MC [36].…”

Section: Introductionmentioning

confidence: 99%

Hysteresis Characteristics of Generalized Spin-S Magnetic Binary Alloys

Karakoyun¹,

Akıncı²

2020

Preprint

Self Cite

View full text Add to dashboard Cite

In this study, hysteresis characteristics of the generalized spin-S binary alloy represented by the formula A c B 1−c have been investigated within the framework of effective field approximation. The binary system consists of type A (spin-S) and type B (spin-S) atoms which are randomly distributed on a honeycomb lattice. Both integer and half-integer spin models of two magnetic atom types are examined. By detailed investigation on hysteresis loops, multiple hysteresis behaviors are obtained for a given set of Hamiltonian parameters. Besides, the quantities of hysteresis characteristics as the hysteresis loop area, remanent magnetization, and coercive field have been investigated as functions of concentration.

show abstract

“…Experimental examples include diluted antiferromagnets Fe x Zn 1−x F 2 [3,4], Rb 2 Co x Mg 1−x F 4 [5,6], Co x Zn 1−x F 2 [6] in a magnetic field and colloid-polymer mixtures [7,8]. From the theoretical point of view, thermal and magnetic phase transition properties of the static RFIM have been investigated by a wide variety of techniques such as Molecular Field Theory (MFT) [2,[9][10][11][12][13], Effective-Field Theory (EFT) [14][15][16][17][18][19][20] and Monte Carlo (MC) simulations [21][22][23][24][25][26][27][28]. These theoretical studies show that different random-field distributions may lead to different physical outcomes, and thereby the existence of a quenched impurity in magnetic field has an important role in material science.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium Multiple Transitions in the Core-shell Ising Nanoparticles Driven by Randomly Varying Magnetic Fields

Vatansever,

Acharyya

2020

Preprint

View full text Add to dashboard Cite

The nonequilibrium behaviour of a core-shell nanomagnet has been studied by Monte-Carlo simulation. The core consists of Ising spins of σ = 1/2 and the shell contains Ising spins of S = 1. The interactions within the core and in the shell are considered ferromagnetic but the interfacial interaction between core and shell is antiferromagnetic. The nanomagnetic system is kept in open boundary conditions and is driven by randomly varying (in time but uniform over the space) magnetic field. Depending on the width of the randomly varying field and the temperature of the system, the core, shell and total magnetization varies in such a manner that the time averages vanish for higher magnitude of the width of random field, exhibiting a dynamical symmetry breaking transitions. The susceptibilities get peaked at two different temperatures indicating nonequilibrium multiple transitions. The phase boundaries of the nonequilibrium multiple transitions are drawn in the plane formed by the axes of temperature and the width of the randomly varying field.

show abstract

Effects of the double Gaussian random field distribution on the phase diagrams and hysteresis characteristics of the magnetic binary alloys

Cited by 7 publications

References 65 publications

Phase Diagrams of Generalized Spin-S Magnetic Binary Alloys

Phase Diagrams of Generalized Spin-S Magnetic Binary Alloys

Hysteresis Characteristics of Generalized Spin-S Magnetic Binary Alloys

Nonequilibrium Multiple Transitions in the Core-shell Ising Nanoparticles Driven by Randomly Varying Magnetic Fields

Contact Info

Product

Resources

About