Monte Carlo simulations in a disordered binary Ising model

Details Monte Carlo simulations in a disordered binary Ising model Monte Carlo simulations in a disordered binary Ising model

2011-09-17

arxiv.org/abs/1109.3797v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, 7 figures

Scientific paper

In this work we study a disordered binary Ising model on the square lattice. The model system consists of two different particles with spin-1/2 and spin-1, which are randomly distributed on the lattice. It has been considered only spin nearest-neighbor exchange interactions with $J>0$. This system can represent a disordered magnetic binary alloy $A_{x}B_{1-x}$, obtained from the high temperature quenching of a liquid mixture. The results were obtained by the use of Monte Carlo simulations for several lattice sizes $L$, temperature $T$ and concentration $x$ of ions $A$ with spin-1/2. We found its critical temperature, through the reduced fourth-order Binder cumulant for the several values of the concentration $x$ of particles (spin-1/2, spin-1), and also the magnetization, the susceptibility and the specific heat as a function of temperature $T$.

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