Magnetic properties of bilayer graphene: a Monte Carlo study

The magnetic and magnetocaloric properties of the nano‐graphene monolayer structure consisting of mixed spins S = 3/2 and σ = 2 are studied by using Monte Carlo simulations. The ground‐state phase diagrams corresponding to several physical parameters are first discussed. The influence of the number of lattice sites on the total and partial magnetizations and the magnetic susceptibilities has been investigated. The critical temperature is deduced. The effect of exchange interaction, external magnetic, and crystal field on total magnetizations is studied. Magnetic hysteresis cycles are obtained. Specific heat change and magnetic entropy changes are inferred for several magnetic fields. Finally, the relative cooling power is determined.

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“…Here

J_{ss}

J_{σσ}

, and

J_{sσ}

are the exchange coupling interactions. [ 42,43 ] Indeed,

J_{ss}

and

J_{σσ}

describe the ferromagnetic interactions, and we take the value

J_{sσ} = 1

in any simulation. h is the external magnetic field and d represents the applied crystal field.…”

Section: Ising Model and Monte Carlo Simulationsmentioning

confidence: 99%

Study of Magnetic and Magnetocaloric Properties of the Nano‐Graphene of Mixed Spins S = 3/2 and σ = 2: A Monte Carlo Simulation

Jerrari

Masrour

Sahdane

2023

Physica Status Solidi (b)

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“…On the other hand, theoretical studies on the magnetic properties of various graphene structures, including nanographene, bilayer or trilayer graphene, and graphyne have been conducted using different calculation techniques such as the mean-field approximation (MFA) [28] and the effective field theory (EFT) [29][30][31][32][33][34][35][36][37], as well as Monte Carlo simulations (MCS) [38][39][40][41][42][43][44][45][46][47][48][49]. In this context, the magnetic properties of graphyne are investigated by the first-principles calculations [18,23,50,51].…”

Section: Introductionmentioning

confidence: 99%

Investigating the magnetic and hysteretic properties of graphyne-based nanostructures: a comparative study of shape effects on critical temperatures, coercivity, and remanence

Kantar

2024

Phys. Scr.

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Our study aims to investigate the physical properties of graphyne-based nanostructures, with a particular focus on their magnetic and hysteretic features. We analyze the influence of shape on these properties in an Ising-type graphyne structure using the effective field theory (EFT) method. Our research focuses on the critical and compensation temperatures, coercivity, and remanence of the graphyne structure in different shapes, ranging from alpha (α) to beta (β) to gamma (γ). We use the magnetization curves and hysteresis loops obtained from central and intermediate spins. We also illustrate the behavior of the coercive field and remanent magnetization as well as hysteresis loop the effect of exchange interactions r and s as well as temperature. We observe N- and R- type compensation in the β graphyne, and L- and S- type compensations in the γ graphyne. We also find that the widest hysteresis is observed in γ graphyne.

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“…Based on Monte Carlo simulations, the magnetic properties of the thin film described by the Ising model were studied. Using this simulation method, Masrour and co-worker have investigated the magnetic properties of graphene (graphene-like) structure, graphene nanoribbons and so on [17][18][19][20][21][22][23][24][25][26][27][28]. By applying firstprinciples density functional theory, Yue et al have studied magnetic properties of graphene nanoribbons with twisted zigzag-edged [29].…”

Section: Introductionmentioning

confidence: 99%

Study on the magnetic and hysteresis behaviors in a bilayer graphene-like ring with edge decorated

Shi¹,

Quan²,

Jiang³

2022

Phys. Scr.

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We employed the effective-field theory with correlations to study the hysteresis and thermodynamic properties of a bilayer graphene-like ring with edge decorated by a ferrimagnetic mixed-spin (2, 5/2) Ising model. The temperature dependence of magnetization, susceptibility, internal energy and specific heat of the system are illustrated in detail. As well, we depict the hysteresis behaviors and phase diagram with various parameters. The results showed the significance of the anisotropy, the magnetic field as well as the exchange coupling in controlling hysteresis behaviors and various magnetic quantities. The possibility of rich multiple-loop hysteresis and reentrant behaviors are found, sensitive to the competition among the physical parameters.

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Magnetic properties of bilayer graphene: a Monte Carlo study

Cited by 40 publications

References 30 publications

Study of Magnetic and Magnetocaloric Properties of the Nano‐Graphene of Mixed Spins S = 3/2 and σ = 2: A Monte Carlo Simulation

Study of Magnetic and Magnetocaloric Properties of the Nano‐Graphene of Mixed Spins S = 3/2 and σ = 2: A Monte Carlo Simulation

Investigating the magnetic and hysteretic properties of graphyne-based nanostructures: a comparative study of shape effects on critical temperatures, coercivity, and remanence

Study on the magnetic and hysteresis behaviors in a bilayer graphene-like ring with edge decorated

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