Compensation Temperature of a Mixed Ising Ferrimagnetic Model in the Presence of External Magnetic Fields

TL;DR

This study investigates the compensation temperature in a mixed Ising ferrimagnetic model with external magnetic fields using Monte Carlo simulations, revealing conditions under which compensation points occur.

Contribution

It introduces a detailed Monte Carlo analysis of a mixed Ising ferrimagnetic model including various interactions and external fields, highlighting the specific conditions for compensation temperature.

Findings

Compensation temperature exists only within a narrow parameter range.

The compensation point is suppressed by larger external magnetic fields.

The model is relevant for understanding bimetallic molecular ferrimagnets.

Abstract

The behavior of the compensation temperature of a mixed Ising ferrimagnetic system on a square lattice in which the two interpenetrating square sublattices have spins $\sigma$ ($\pm 1/2$) and spins $S$ ($\pm 1,0$) has been studied with Monte Carlo methods. Our model includes nearest and next-nearest neighbor interactions, a crystal field and an external magnetic field. This model is relevant for understanding bimetallic molecular ferrimagnetic materials. We found that there is a narrow range of parameters of the Hamiltonian for which the model has compensation temperatures and that the compensation point exists only for small values of the external field.