Magnetocaloric Properties of the Ising nanotube

TL;DR

This study investigates the magnetocaloric properties of an Ising nanotube with variable core and shell spins using mean field approximation, revealing key thermodynamic behaviors and a double peak phenomenon.

Contribution

It introduces a theoretical analysis of the magnetocaloric effect in Ising nanotubes with arbitrary spins, including the first observation of a double peak in entropy change.

Findings

Double peak behavior in entropy change with temperature

Dependence of magnetocaloric properties on spin values and exchange interactions

Quantitative analysis of entropy change, FWHM, and refrigerant capacity

Abstract

The magneticaloric properties of the Ising nanotube constituted by arbitrary core spin values $S_c$ and the shell spin values $S_s$ have been investigated by mean field approximation. During this investigation, several quantities have been calculated, such as isothermal magnetic entropy change, full width at half maximum value and the refrigerant capacity. The variation of these quantities with the values of the spins and exchange interaction between the core and shell is determined. Besides, recently experimentally observed double peak behavior in the variation of the isothermal magnetic entropy change with the temperature is obtained for the nanotube.