Numerical Study of a Three-Dimensional Mixed Ising Ferrimagnet in the Presence of an External Field

TL;DR

This study uses Monte Carlo simulations to explore the magnetic phase diagram of a three-dimensional mixed Ising ferrimagnet, revealing how external and interaction parameters influence the compensation point and temperature.

Contribution

It provides the first detailed numerical analysis of the effects of external fields and interactions on the compensation point in a 3D mixed Ising ferrimagnet.

Findings

Compensation point appears when next-nearest-neighbor interaction exceeds a threshold.

Compensation temperature strongly depends on interactions, especially crystal and external fields.

External field can extend the range of the compensation temperature.

Abstract

We present a numerical study based on Monte Carlo algorithm of the magnetic properties of a mixed Ising ferrimagnetic model on a cubic lattice where spins $\sigma =\pm 1/2$ and spins $S=0,\pm 1$ are in alternating sites on the lattice. We carried out exact ground state calculations and employ a Monte Carlo simulation to obtain the finite-temperature phase diagram of the model. A compensation point appears when the next-nearest-neighbor interaction between the spins $\sigma =\pm 1/2$ exceeds a minimum value. We found a strong dependence of the compensation temperature with the interactions in the Hamiltonian, particulary the crystal field and the external field. An applied field can change the range of values of the compensation temperature from zero up to a maximum value that depends on the field.