Microscopic study on magnetocaloric and electrocaloric effects near the critical point

Hitoshi Honmi, Yoichiro Hashizume, Takashi Nakajima and Soichiro Okamura

Physica A: Statistical Mechanics and its Applications, 2015, vol. 433, issue C, 126-135

Abstract: Adiabatic temperature changes of magnetocaloric/electrocaloric effects are analytically investigated. The analytical studies are based on the microscopic statistical models such as Husimi–Temperley model and Slater model. As a result, we show the characteristic scales of the adiabatic processes correspond to microscopic parameters, namely exchange couplings and Slater energy. The scaled parameter dependence become stronger near the critical point. Furthermore, using a general Hamiltonian method, we clarify the adiabatic temperature changes depend on the relative ratio of characteristic scales. The present study may propose a useful aspect for applications.

Keywords: Magnetocaloric/electrocaloric effects; Phase transition; Husimi–Temperley model; Slater model; Fluctuation; Adiabatic process (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:433:y:2015:i:c:p:126-135

DOI: 10.1016/j.physa.2015.03.079

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