Magnetocaloric effect in bilayer material: Spin-S Ising model

TL;DR

This paper investigates the magnetocaloric effect in a bilayer spin-S Ising model, analyzing entropy changes, peak behaviors, and the influence of exchange interactions, providing theoretical insights into experimental phenomena in manganite bilayers.

Contribution

It introduces a theoretical analysis of the magnetocaloric effect in bilayer spin-S Ising systems, explaining double and single peak behaviors observed experimentally.

Findings

Relation between IMEC and spin value established

Conditions for transition from double to single peak behavior identified

Theoretical explanation for experimental double peaks in manganite bilayers

Abstract

The isothermal magnetic entropy change has been obtained for the bilayer system that consists of $S_u$ and $S_l$ valued spins in each layer. The relation between the IMEC and the spin value as well as the value of exchange interaction between two layers have been obtained. Recently experimentally given double peaks behavior for manganite bilayers has been demonstrated theoretically, and explanation is given. On the other hand, the conditions that give rise to transition from this double peak behavior to the single peak behavior have been obtained and discussed.