Search Results - subject:"Cluster variation method"

Spin-1 Blume–Capel model with random crystal field effects

Albayrak, Erhan - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 4, pp. 552-557

The random-crystal field spin-1 Blume–Capel model is investigated by the lowest approximation of the cluster-variation … method which is identical to the mean-field approximation. The crystal field is either turned on randomly with probability p …

Persistent link: https://www.econbiz.de/10011063269

Spin-32 Ising model by the cluster variation method and the path probability method

Canko, O.; Keskin, M. - In: Physica A: Statistical Mechanics and its Applications 363 (2006) 2, pp. 315-326

using the lowest approximation of the cluster variation method (LACVM) and the path probability method (PPM) with the point …

Persistent link: https://www.econbiz.de/10010871879

Multicritical behavior of the antiferromagnetic spin‐32 Blume–Emery–Griffiths model

Keskin, Mustafa; Ali Pınar, M.; Erdinç, Ahmet; Canko, … - In: Physica A: Statistical Mechanics and its Applications 364 (2006) C, pp. 263-270

is studied within the lowest approximation of the cluster variation method. We have investigated the thermal variations …

Persistent link: https://www.econbiz.de/10011060265

Magnetic properties of the mixed spin-12 and spin-1 Ising ferromagnetic system

Ekiz, Cesur; Keskin, Mustafa - In: Physica A: Statistical Mechanics and its Applications 317 (2003) 3, pp. 517-534

the absence and presence of an external magnetic field are studied by using the cluster variation method. Thermal …

Persistent link: https://www.econbiz.de/10010872221

Dynamic behaviour of the modified Pople–Karasz model

Özgan, Şükrü; Yazıcı, Mustafa; Keskin, Mustafa - In: Physica A: Statistical Mechanics and its Applications 317 (2003) 3, pp. 354-370

The dynamic behaviour of the modified Pople–Karasz model is studied by the direct relaxation method and the path probability method. First the equilibrium behaviour of the model is given briefly in order to understand the dynamic behaviour. Then the direct relaxation method, which is based on...

Persistent link: https://www.econbiz.de/10011060466

Critical properties of a spin-32 Ising model with bilinear and biquadratic interactions

Özsoy, Osman; Keskin, Mustafa - In: Physica A: Statistical Mechanics and its Applications 319 (2003) C, pp. 404-420

We have studied the temperature dependences of the magnetization and the quadrupolar moment of a spin-32 Ising model Hamiltonian with bilinear and biquadratic interactions using the molecular field approximation. A number of characteristic behaviors for the thermal variations of the order...

Persistent link: https://www.econbiz.de/10011061513

Metastable and unstable states of the Blume–Capel model obtained by the cluster variation method and the path probability method

Ekiz, Cesur; Keskin, Mustafa; Yalçın, Orhan - In: Physica A: Statistical Mechanics and its Applications 293 (2001) 1, pp. 215-232

the lowest approximation of the cluster variation method which is identical to the mean-field approximation. Besides the …

Persistent link: https://www.econbiz.de/10011062342

Equivalence of two parallel approaches to the cluster variation method: the multisite correlation functions method and the cluster effective fields method

Matić, V.M.; Milošević, S. - In: Physica A: Statistical Mechanics and its Applications 262 (1999) 1, pp. 215-231

We have analyzed relationship between two parallel approaches to the cluster variation method (CVM) as a theoretical …

Persistent link: https://www.econbiz.de/10011057775

Replacive ordering in alloys

Banerjee, S.; Arya, A.; Das, G.P. - In: Physica A: Statistical Mechanics and its Applications 270 (1999) 1, pp. 215-225

Replacive ordering can occur in an alloy in a continuous mode by the development and amplification of concentration waves of appropriate wave vectors, k. Such processes known as spinodal clustering (k∼〈000〉) and spinodal ordering (k defining the relevant superlattice structure) become...

Persistent link: https://www.econbiz.de/10011059943

Cluster variation studies of the anisotropic exchange interaction model

King, T.C.; Chen, H.H. - In: Physica A: Statistical Mechanics and its Applications 267 (1999) 1, pp. 153-164

The cluster variation method is applied to study critical properties of the Potts-like ferromagnetic anisotropic …

Persistent link: https://www.econbiz.de/10010664908