Phase diagrams and magnetic properties of a double fullerene structure with core/shell

• Published in: Chinese journal of physics (Taipei) Vol. 59; pp. 346 - 356
• Main Authors: Aouini, S., Mhirech, A., Alaoui-Ismaili, A., Bahmad, L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2019
• Subjects: Core-Shell nanostructure; Crystal field; Fullerene structure; Magnetic properties; Monte Carlo simulations; Phase diagrams; Phase diagrams; Monte Carlo simulations; Core-Shell nanostructure; Crystal field; Fullerene structure; Magnetic properties
• ISSN: 0577-9073
• DOI: 10.1016/j.cjph.2018.12.028

•The magnetic properties of a double fullerene nano-structure have been investigated.•The nano-spheres are studied under the effect of both an external and crystal magnetic fields.•The Monte Carlo simulations have been applied.•The compensation temperature of the double fullerene structure has been investigated and discussed.•The coercive magnetic field and the hysteresis cycles are studied and interpreted. In This work, we apply the Monte Carlo simulations to study the magnetic properties and compensation behavior of a core/shell double fullerene structure X60 where the symbol X can be assigned to any magnetic atom. We focus our study on a system formed by a double sphere core-shell, represented by the Ising model. The two spheres are containing the spins: S=1/2 in the core; and σ=1 in the shell, respectively. In a first step, we investigate and discuss the corresponding ground state phase diagrams in different planes. Also, we illustrated the behavior of the magnetizations and the effect of the coupling exchange interactions as well as the crystal field. The effect of the external magnetic field, and the exchange coupling interactions on the hysteresis loops have been inspected. To complete this study, we showed the existence of the compensation temperature for the studied system.