Anomalies in the multicritical behavior of staggered magnetic and direct magnetic susceptibilities of iron group dihalides

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.

Frequency Variation of the AC Order Parameter Susceptibility of the Metamagnetic Ising Model

“…These results are in accordance with the temperature variances of ( ) and ( ) in the low-frequency region: ( ) follows the scaling law | − | −1 for temperatures converging and ( ) varies as | − | −2 and vanishes in the limit → 0 [15]. Finally, zero frequency limit of is comparable with the static results of iron group dihalides in static fields where increases rapidly with rising temperature and diverges at the critical and multicritical points [9,20].…”

Nonequilibrium dynamics of a spin-3/2 Blume-Capel model with quenched random crystal field

“…In addition to these, with the helping of Nelson's method, a systematic investigation containing frequency, momentum and temperature dependent response function has been achieved for Ising-type system below the critical temperature [39]. Very recently, a comprehensive study including the equilibrium and nonequilibrium antiferromagnetic and ferromagnetic susceptibilities of a metamagnetic Ising system in the vicinity of order-disorder transition point has been done by benefiting from mean field approximation (MFA) [40].…”

Static quadrupolar susceptibility for a Blume–Emery–Griffiths model based on the mean-field approximation

“…A jump in a secondary orderparameter susceptibility is often observed near continuous phase transition. For example in the spin-1 2 metamagnetic Ising systems the finite jumps are observed in the total susceptibility whereas the staggered susceptibility diverges [30].…”

“…This interesting property can be called as quadrupolar susceptibility (χ q ). The theoretical investigation of the quadrupolar susceptibility has been of the interest of various authors for quite a while [27][28][29][30]. In 1978, Westwanski has obtained the diagrammatic derivation of dipolar and quadrupolar susceptibility in the paramagnetic limit for arbitrary spin in the (1/z) 1 approximation [27].…”