Study of magnetic properties of a nano-graphene monolayer within Ising ferromagnetic model with mixed spins

2019 ◽  
Author(s):  
Oleg Angelsky ◽  
Viktor Ivashko ◽  
Petro Maksimyak
Keyword(s):  
Magnetic Properties ◽  
Graphene Monolayer ◽  
Mixed Spins ◽  
Nano Graphene

First-principles studies of the elastic and magnetic properties of monolayer CrN

2021 ◽  
Author(s):  
Tai Ma ◽  
Jia Wang ◽  
Xu Li ◽  
Min Pu
Keyword(s):  
Magnetic Properties ◽  
Band Structure ◽  
First Principles ◽  
Electronic Band Structure ◽  
Strain Analysis ◽  
Exchange Interactions ◽  
Potential Method ◽  
Graphene Monolayer ◽  
Electronic Band ◽  
Spin Electronics

Two-dimensional (2D) materials with robust ferromagnetism properties have high potentials for application in the field of spintronics. However, extensively pursued 2D sheets, including pure graphene, monolayer BN, and layered transition metal dichalcogenides, are either nonmagnetic or weakly magnetic. The elastic, electronic and magnetic properties of monolayer CrN are calculated using the plane wave pseudo potential method based on first-principles density function theory. Upon determining through calculation that the structure of the monolayer CrN nanosheet is stable, its layer modulus [Formula: see text] shows that its strain resistance is stronger than that of graphene. Through strain analysis, materials with a monolayer CrN type of structure can be obtained. It is determined that 10% of the change in equilibrium area is still applicable to the 2D EOS, showing that this structure is quite stable. The spin-polarized electronic band structure is also calculated under different plane symmetry strains. The plane strain can be used to effectively adjust the metallic and magnetic properties of the material. Analyses of the band structure and density of states reveal that this material is half-metallic, where the origin of the ferromagnetism is related to [Formula: see text]–[Formula: see text] exchange interactions between the Cr and N atoms. Monolayer CrN has semimetallic properties and strong ferromagnetic (FM) properties. The FM effect can enhance the stability of the material. The results show that monolayer CrN is a semimetallic material with good elastic properties and a strong FM property. This material is therefore expected to have good application rospects in the field of spin electronics.

Monte Carlo Study of Magnetic Properties of Mixed Spins in a Fullerene X30Y30-Like Structure

2018 ◽  
Vol 192 (1-2) ◽  
pp. 65-74 ◽  
Author(s):  
A. Mhirech ◽  
S. Aouini ◽  
A. Alaoui-Ismaili ◽  
L. Bahmad
Keyword(s):  
Monte Carlo ◽  
Magnetic Properties ◽  
Monte Carlo Study ◽  
Mixed Spins

Study on magnetic properties of a nano-graphene bilayer

Carbon ◽  
2015 ◽  
Vol 95 ◽  
pp. 190-198 ◽  
Author(s):  
Wei Jiang ◽  
Ying-Ying Yang ◽  
An-Bang Guo
Keyword(s):  
Magnetic Properties ◽  
Graphene Bilayer ◽  
Nano Graphene

Mixed spin-3/2 and spin-2 nanowire: magnetic properties and hysteresis behaviors

2021 ◽  
Vol 17 (3) ◽  
pp. 615-629
Author(s):  
Karima El Kihel ◽  
Rachid Aharrouch ◽  
Yahya Al Qahoom ◽  
Mohamed Madani ◽  
Nabil Hachem ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Exchange Interaction ◽  
Crystal Field ◽  
Hysteresis Loops ◽  
Magnetic Nanowires ◽  
Content Type ◽  
Mixed Spins ◽  
Mixed Spin ◽  
Compensation Behavior ◽  
Hamiltonian Parameters

PurposeThe purpose of this article is to investigate the magnetic properties and the hysteresis loops behavior of a ferrimagnetic cubic nanowire with mixed spins SA = 3/2 and SB = 2.Design/methodology/approachWe have used the Monte Carlo simulation to examine the influences of the exchange interaction JB, the crystal field ∆ and the temperature on the magnetic properties and hysteresis loops of the nanowire. More exactly, we have shown the temperature dependence of the sublattice magnetizations (mA and mB) and the total magnetization (M) for several values of the Hamiltonian parameters, as well as the corresponding phase diagrams. Finally, the effect of an external magnetic field is studied by plotting the hysteresis loops of the system for different values of exchange interaction, crystal field and temperature.FindingsThe obtained results show the existence of second-order phase transitions, as well as the compensation behavior. Moreover, according to the values of the Hamiltonian parameters, the system can exhibit one, two or three hysteresis loops.Originality/valueThe magnetic nanowires are of great interest in experimental works, but without theoretical explanations, the experimental results cannot be clarified in depth. For this, we contribute through this theoretical study to understand the nanowires, especially those with mixed spins (2, 3/2).

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