Journal Article

Magnetic properties of a triangle double-layer graphene nanoisland: a Monte Carlo study

Wu, Hao-Jia, Xie, Pei-Nan, Wang, Wei, Lv, Jia-Hui, Peng, Zhou

2020

Overview

By using Monte Carlo simulations, we investigated a triangle double-layer graphene nanoisland with mixed-spin (3/2, 2) configuration. We focused on the effects of crystal-fields, exchange couplings, longitudinal magnetic fields, and temperature on the magnetic properties of the system. Various curves of magnetization, susceptibility, and internal energy as a function of temperature were obtained. We plotted the phase diagrams of blocking temperature in the different parameter planes. We found that increasing | J ab / J Z |, J bb / J Z , and h / J Z or weakening | D b / J Z | is beneficial to improving the T B / J Z , but the T B / J Z is very insensitive to changes in the D a / J Z and J aa / J Z . In addition, it is worth noting that the system can exhibit abundant multiple-loops hysteresis behaviors for certain physical parameters, such as triple, quadruple, quintuple, septuple hysteresis loops.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Applied and Technical Physics / Atomic / Boundary conditions / Complex Systems / Condensed Matter Physics / Couplings / Electrons / Graphene / Hysteresis loops / Internal energy / Magnetic fields / Magnetic properties / Mathematical and Computational Physics / Molecular / Monte Carlo simulation / Nanomaterials / Optical and Plasma Physics / Parameters / Phase diagrams / Phase transitions / Physical properties / Physics / Physics and Astronomy / Quantum dots / Regular Article / Temperature / Theoretical