Magnetic ordered structure dependence of magnetic refrigeration efficiency

TL;DR

This study explores how the magnetic ordered structure influences the efficiency of magnetic refrigeration, using Monte Carlo simulations on the Ising model to identify optimal conditions for entropy change and heat transfer.

Contribution

It demonstrates that specific protocols can maximize magnetic entropy change and heat transfer in antiferromagnets, linking physical quantities to refrigeration efficiency.

Findings

Maximum isothermal magnetic entropy change achieved in antiferromagnets.

Total heat transfer reaches a maximum under the proposed protocol.

Relation between physical quantities and efficiency is established.

Abstract

We have investigated the relation between magnetic ordered structure and magnetic refrigeration efficiency in the Ising model on a simple cubic lattice using Monte Carlo simulations. The magnetic entropy behaviors indicate that the protocol, which was first proposed in [Appl. Phys. Lett. {\bf 104}, 052415 (2014).], can produce the maximum isothermal magnetic entropy change and the maximum adiabatic temperature change in antiferromagnets. Furthermore, the total amount of heat transfer under the proposed protocol reaches a maximum. The relation between measurable physical quantities and magnetic refrigeration efficiency is also discussed.