Magnetic Behavior of a Mixed Ising Ferrimagnetic Model in an Oscillating Magnetic Field

Abstract

The magnetic behavior of a mixed Ising ferrimagnetic system on a square lattice, in which the two interpenetrating square sublattices have spins +- 1/2 and spins +-1,0, in the presence of an oscillating magnetic field has been studied with Monte Carlo techniques. The model includes nearest and next-nearest neighbor interactions, a crystal field and the oscillating external field. By studying the hysteretic response of this model to an oscillating field we found that it qualitatively reproduces the increasing of the coercive field at the compensation temperature observed in real ferrimagnets, a crucial feature for magneto-optical applications. This behavior is basically independent of the frequency of the field and the size of the system. The magnetic response of the system is related to a dynamical transition from a paramagnetic to a ferromagnetic phase and to the different temperature dependence of the relaxation times of both sublattices.

arXiv comment10 figures. To be published in Phys.Rev B

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• Dynamic Phase Transition in a Time-Dependent Ginzburg-Landau Model in an Oscillating Field
• Monte Carlo investigation of a spherical ferrimagnetic core-shell nanoparticle under a time dependent magnetic field
• Dynamic phase transition of the Blume-Capel model in an oscillating magnetic field
• Dynamic phase transitions in the presence of quenched randomness
• Monte Carlo study of the two-dimensional kinetic Blume-Capel model in a quenched random crystal field
• Nonmagnetic impurities and roughness effects on the finite temperature magnetic properties of core-shell spherical nanoparticles
• Dynamic phase transitions on the kagome Ising ferromagnet
• Phase diagram of the mixed-spin (1,3/2) Ising ferrimagnetic system with two different anisotropies
• Monte Carlo study of the two-dimensional kinetic Ising model under a nonantisymmetric magnetic field
• Dynamically Reentrant Skyrmion Phase in Oscillating Magnetic Fields