Magnetic and Magnetocaloric Properties of a C$_{20}$ Fullerene Structure: Monte Carlo Study

TL;DR

This study uses Monte Carlo simulations to explore the magnetic and magnetocaloric properties of a Fullerene C20 system with mixed spins, revealing stable magnetic phases, temperature effects, and enhanced cooling performance.

Contribution

It introduces a detailed Monte Carlo analysis of the magnetic and magnetocaloric behavior of Fullerene C20 with mixed spins, highlighting the effects of spin interactions and external fields.

Findings

Ferrimagnetic and ferromagnetic phases are stable.

Magnetization behavior varies with temperature.

Magnetic entropy and RCP are affected by exchange interactions.

Abstract

One of the most active classes of nanostructures is Fullerene C$_{20}$, which has been exploited as an active component in significant applications. In this investigation, we used Monte Carlo simulations to investigate the magnetic and magnetocaloric properties of the mixed spins 2 and 3/2 Fullerene C$_{20}$ system. Ferrimagnetic and ferromagnetic phases are stable, according to the ground state phase diagrams that have been constructed. The behavior of the magnetizations and the derivative of magnetization, in particular, have shown the impact of rising temperature. Additionally, we found an increase of the reduced Curie temperature to reach $t_C = 3$, when the interactions between the spins S are increased. For numerous reduced external magnetic fields and reduced temperatures, the magnetic entropy variations are studied. The Relative Cooling Power (RCP) is calculated. It is demonstrated that the reduced exchange coupling interactions p and r lead to an increase in the lowered magnetic coercive field.