三角形晶格上的随机-各向异性混合自旋Ising

IF 0.9 4区物理与天体物理 Q4 PHYSICS, CONDENSED MATTER

Condensed Matter Physics Pub Date : 2023-05-25 DOI:10.5488/CMP.26.23601

E. S. de Santana, A. D. de Arruda, M. Godoy

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引用次数: 0

摘要

我们研究了具有随机各向异性的混合自旋-1/2和1 Ising铁磁系统，该系统在三角形晶格上具有三个互穿亚晶格a、B和c。亚晶格上的自旋分别用σA(态±1/2)、σB(态±1/2)和SC(态±1,0)表示。我们通过蒙特卡罗模拟得到了温度kBT/|J|随随机各向异性强度D/|J|的相图。在较低温度下，当p < 0.25时，两个铁磁FR1和FR2相之间的相界始终是一级相，FR1、FR2与顺磁p相之间的相界始终是二级相转变。另一方面，对于p⪆0.5的值，相图只显示二阶相变线。

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Random-anisotropy mixed-spin Ising on a triangular lattice

We have studied the mixed spin-1/2 and 1 Ising ferrimagnetic system with a random anisotropy on a triangular lattice with three interpenetrating sublattices A, B, and C. The spins on the sublattices are represented by σA (states ±1/2), σB (states ±1/2), and SC (states ±1, 0). We have performed Monte Carlo simulations to obtain the phase diagram temperature kBT/|J| versus the strength of the random anisotropy D/|J|. The phase boundary between two ferrimagnetic FR1 and FR2 phases at lower temperatures are always first-order for p < 0.25 and second-order phase transition between the FR1, FR2 and the paramagnetic P phases. On the other hand, for values of p ⪆ 0.5, the phase diagram presents only second-order phase transition lines.

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来源期刊

Condensed Matter Physics 物理-物理：凝聚态物理

CiteScore

1.10

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Condensed Matter Physics contains original and review articles in the field of statistical mechanics and thermodynamics of equilibrium and nonequilibrium processes, relativistic mechanics of interacting particle systems.The main attention is paid to physics of solid, liquid and amorphous systems, phase equilibria and phase transitions, thermal, structural, electric, magnetic and optical properties of condensed matter. Condensed Matter Physics is published quarterly.