The influence of structural short-range order on the phase diagrams of diluted FCC magnet with arbitrary spin and modified RKKY interaction

TL;DR

This paper investigates how atomic short-range order affects the phase diagrams of diluted FCC magnets with arbitrary spin and modified RKKY interactions, using a two-sublattice model and molecular field approximation.

Contribution

It introduces a comprehensive analysis of the impact of short-range order on magnetic phase diagrams in diluted FCC systems with arbitrary spin and RKKY interactions.

Findings

Short-range order significantly influences phase boundaries.

Phase diagrams vary with magnetic ion and charge concentration.

The model captures complex magnetic thermodynamic behaviors.

Abstract

A diluted FCC magnet with modified long-range RKKY interaction and arbitrary Ising spin S is considered within two-sublattice model. In the molecular field approximation the Gibbs free-energy is derived, from which all magnetic thermodynamic properties can be self-consistently obtained. In particular, the phase diagrams are studied for different magnetic ion and free-charge concentration, the atomic short-range-order (Warren-Cowley) parameter being taken into account.