Solid-State Heating Using the Multicaloric Effect in Multiferroics

Melvin M Vopson,Yuri K Fetisov,Ian Hepburn

doi:10.3390/magnetochemistry7120154

Abstract

The multicaloric effect is defined as the adiabatic reversible temperature change in multiferroic materials induced by the application of an external electric or magnetic field, and it was first theoretically proposed in 2012. The multicaloric effects in multiferroics, as well as other similar caloric effects in single ferroics, such as magnetocaloric, elastocaloric, barocaloric, and electrocaloric, have been the focus of much research due to their potential commercialization in solid-state refrigeration. In this short communication article, we examine the thermodynamics of the multicaloric effect for solid-state heating applications. A possible thermodynamic multicaloric heating cycle is proposed and then implemented to estimate the solid-state heating effect for a known electrocaloric system. This work offers a path to implementing caloric and multicaloric effects to efficient heating systems, and we offer a theoretical estimate of the upper limit of the temperature change achievable in a multicaloric cooling or heating effect.

Highlights

As it is typical of currently known electrocaloricA materials, change in in thethe application of an fieldfield is low; for PbSc0.5 Ta0.5 O3 (PST), the materials,the thetemperature temperature change application of electric an electric is low; for PST,
The multicaloric effect is defined as the adiabatic reversible temperature change in multiferroic materials induced by the application of an external electric or magnetic field, and it was first theoretically proposed in 2012
Solid-state caloric effects [1,2,3,4,5,6] manifest as a temperature change within a given physical system in response to adiabatic changes of internal or external variables such as volume, strain, magnetization, or polarization

Summary

As it is typical of currently known electrocaloric

A materials, change in in thethe application of an fieldfield is low; for PST, the materials,the thetemperature temperature change application of electric an electric is low; for PST,. V μm electric field field [40]. [40]

TheThe resulting thermal output power and arepresented presentedininFigure

Findings

AAcycle in Figure