Magnetocaloric Effect and Magnetic Properties of Core-Shell Ferrimagnetic Spherical Nanoparticle: A Monte Carlo Study

Abstract

In this work, a Monte Carlo simulation based on the Metropolis algorithm has been applied to investigate the magnetic properties and the magnetocaloric effect (MCE) of a ferrimagnetic nanoparticle, with a core-shell structure. The magnetic properties of ferrimagnetic nanoparticle were shown, the influences of the interface and shell couplings on both compensation and critical temperatures were examined and the effect of shell thickness was elucidated. The MCE was obtained by calculating the magnetic entropy change (−ΔS m ) using the Maxwell relation. The shell coupling J sh , the antiferromagnetic interface coupling J int , and the ferromagnetic shell thickness R sh of the nanoparticle impact the MCE. Our findings could pave the way for enhancement of the MCE of the present system, controlled by the variation of the magnetic interactions and external magnetic field.