Anomalies in the Multicritical Behavior of Staggered Magnetic and Direct Magnetic Susceptibilities of Iron Group Dihalides

TL;DR

This paper investigates the temperature-dependent magnetic response functions of iron-group dihalides near multi-critical points, revealing anomalies and the influence of exchange interactions, using a molecular field approximation.

Contribution

It provides new insights into the anomalies in magnetic susceptibilities of dihalides near multi-critical points and explores the effects of exchange interaction ratios.

Findings

Anomalies in magnetic response functions for r<0.3

Influence of inter- and intra-layer exchange interactions

Comparison with related theoretical works

Abstract

In this study, the temperature dependencies of magnetic response functions of the anhydrous dihalides of iron-group elements are examined in the neighborhood of multi-critical points (tricritical, critical end point, double critical end point) and first order transition temperatures within molecular field approximation. Our findings reveal the fact that metamagnetic Ising system exhibits anomalies in the temperature dependence of the magnetic response functions for r<0.3. In addition, we extensively investigated how an inter- and intra-layer exchange interaction ratio can influence magnetic response properties of these systems. Finally, a comparison is made with related works.