Monte Carlo investigation of a spherical ferrimagnetic core-shell nanoparticle under a time dependent magnetic field

TL;DR

This study uses Monte Carlo simulations to analyze the dynamic phase transition properties of a spherical ferrimagnetic core-shell nanoparticle under an oscillating magnetic field, revealing how parameters influence phase boundaries and magnetization behavior.

Contribution

It provides new insights into the dynamic magnetic behavior of core-shell nanoparticles under time-dependent fields, including size effects and phase boundary dependencies.

Findings

Phase boundaries depend on field amplitude and period.

Magnetization curves follow P, N, and Q-type classifications.

Particle size influences thermal and magnetic properties.

Abstract

Monte Carlo simulation based on Metropolis algorithm has been used with a great success to analyze the dynamic phase transition properties of a single spherical core-shell nanoparticle system with a spin-3/2 core surrounded by a spin-1 shell layer with antiferromagnetic interface coupling under the influence of a time dependent oscillating magnetic filed. It has been found that the dynamic phase boundaries strongly depend on the Hamiltonian parameters such as for the high amplitude and period values of the external field, the phase transition temperature sharply changes whereas it tends to slowly alter as the reduced magnitude of interlayer parameter $\mathrm{J_{int}/J_{sh}}$ increases. Moreover, it is observed that the magnetization curves of the particle have been found to obey P-type, N-type and Q-type classification schemes under certain conditions. Much effort has also been paid to the influence of the particle size on the thermal and magnetic properties of the particle. Finally, a comparison of our observations with those of recently published study including dynamic treatments of a nanocubic core-shell system is represented and the findings indicate that there exists a qualitatively good agreement with some relatively distinct differences.