The magnetic properties of the double perovskite oxide Sr2FeMoO6 are analyzed using a mixed-spin Ising model with spins (21,25) in the presence of a random crystal field Δ and exchange interactions J on a three-dimensional (3D) cubic lattice. The study employs both the Mean-Field Approximation (MFA) based on the Bogoliubov inequality for Gibbs free energy and Monte Carlo (MC) simulations using the Metropolis algorithm to provide a comprehensive analysis of the system's phase transitions and magnetization behavior, with focusing on the role of Fe and Mo sublattices. We establish the ground-state phase diagram, identifying multiple stable magnetic configurations and first-order transitions at low temperatures. Indicate compensation temperature Tcomp. This work provides deeper insight into the thermodynamic, physics statistic and magnetic properties of Sr2FeMoO6, with implications for future applications in spintronics and magnetic storage technologies.
@article{arxiv.2503.05002,
title = {Magnetic Phase Transitions and Mixed Spin in Double Perovskite $Sr_{2}FeMoO_{6}$},
author = {Said Khaireddine and Redouane Assad and Mohammed El Falaki and Rachid Ahl Lamara and Lalla Btissam Drissi},
journal= {arXiv preprint arXiv:2503.05002},
year = {2025}
}