Distribution function for random interaction fields in disordered magnets: Spin and macrospin glass

Belokon, V. I.; Nefedev, Konstantin

doi:10.1134/1.1391530

Cited by 39 publications

(28 citation statements)

References 5 publications

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“…Then we will derive from (2) and (3) (6) (7) and from (4) and (5) (8) (9) where Set of equations (6)- (9) at h e > 0 (in this case, mag netization M is always positive) can be presented as follows. Let us introduce the notation Then we will derive from (6)-(9) (10) (11) (12) where (13) In fact, these equations are parametric depen dences M(p, K, h e ) and μ(p, K, h e ) since, as we can eas ily convince, such range of values of parameter w always occurs at h e > 0, for which p calculated by for mula (11) runs the entire range from 0 to 1. Indeed, it follows from (11) and (13) at w h e + 0 that y +∞, while p 0.…”

Section: Ising Model With Mobile Impurities and The Approximated Methmentioning

confidence: 99%

“…The calculation shows that chemical potential μ calculated according to formulas (12) and (16) is a monotonically increasing function of concentration p at all values of temperature only if γ > -1. If γ ≠ -1, the value of K k occurs, at which there is the concentration region for all K > K k with < 0.…”

Section: Ising Model With Mobile Impurities and The Approximated Methmentioning

confidence: 99%

“…These methods are based on the averaging over local exchange fields. The procedure of the averaging over local fields can also be used to ana lyze the behavior of an alloy of two types of magnetic atoms [10], as well as to analyze systems in which the exchange integral is a continuous function of the interatomic distance [11,12]. The authors of [13] already applied one variant of this procedure to ana lyze equilibrium states of the alloy of magnetic and nonmagnetic atoms in the absence of the external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Bethe approximation in the Ising model with mobile impurities

Semkin

Smagin

2015

Phys. Solid State

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The Bethe approximation as applied to a system consisting of magnetic and nonmagnetic atoms in the thermodynamic equilibrium has been considered. In this approximation, the dependences of the mag netization and Curie temperature on the concentration of magnetic atoms for the Ising model with mobile nonmagnetic impurities have been constructed and the limiting concentrations of the appearance of sponta neous magnetization in the ground state have been obtained. It has been established that the considered approximation for a one dimensional chain is the exact solution.

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Section: Ising Model With Mobile Impurities and The Approximated Methmentioning

confidence: 99%

Section: Ising Model With Mobile Impurities and The Approximated Methmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bethe approximation in the Ising model with mobile impurities

Semkin

Smagin

2015

Phys. Solid State

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“…It should be marked out also that the critical temperature of magnetic phase transition in diluted magnetic materials depends very much on the concentration of "magnetic atoms" [3,5].…”

Section: Introductionmentioning

confidence: 99%

“…For solution of the problem let us use the model of "average spin" developed by us [5,6], the basic provision of which are formulated below.…”

Section: Introductionmentioning

confidence: 99%

Modelling study of magnetic and concentration phase transition in ultrathin antiferromagnetic films

Afremov

Aleksandr

2014

J. Phys.: Conf. Ser.

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Abstract. Using the method of the "average spin" a modelling study of magnetic and concentration phase transition in ultrathin antiferromagnetic of different crystalline structure has been carried out. It has been shown, that relative change of Neel temperature is subject to the power law with negative index which doesn't depend on the film's crystal kind. The calculation of the dependence of phase transition critical concentration in diluted magnetic material on the film thickness has been made out. The legitimacy of the use of the method developed for modelling of magnetic and concentration phase transition in different nanostructures is certified by accordance between the results of calculations and the experimental data.

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Magnetic Capacitance in Variable‐Valence Manganese Sulfides

Aplesnin

Харьков

Filipson

2020

Physica Status Solidi (b)

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The permittivity of TmxMn1–xS (0 < x < 0.15) solid solutions is measured in the frequency range of 102–106 Hz at temperatures of 300–500 K in magnetic fields of up to 12 kOe. The migration and relaxation conductivity contributions to the electric polarization are established. The relaxation time and activation energy are calculated using the Debye model. A decrease in the capacitance and relaxation time in a magnetic field is observed. The electron polarization relaxation channel provided by recombination of the electron–hole pairs is found using the infrared spectroscopy investigations.

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Distribution function for random interaction fields in disordered magnets: Spin and macrospin glass

Cited by 39 publications

References 5 publications

Bethe approximation in the Ising model with mobile impurities

Bethe approximation in the Ising model with mobile impurities

Modelling study of magnetic and concentration phase transition in ultrathin antiferromagnetic films

Magnetic Capacitance in Variable‐Valence Manganese Sulfides

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