Microscopic study on magnetocaloric and electrocaloric effects near the critical point

被引：2

作者：

Honmi, Hitoshi ^{[1
]}

Hashizume, Yoichiro ^{[1
]}

Nakajima, Takashi ^{[1
]}

Okamura, Soichiro ^{[1
]}

机构：

[1] Tokyo Univ Sci, Katsushika Ku, Tokyo 1258585, Japan

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2015年 / 433卷

关键词：

Magnetocaloric/electrocaloric effects; Phase transition; Husimi-Temperley model; Slater model; Fluctuation; Adiabatic process; PHENOMENOLOGICAL THEORY; SPIN-GLASSES; THIN-FILM; ORDER;

D O I：

10.1016/j.physa.2015.03.079

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：126 / 135

页数：10

共 29 条

[11] METHOD OF SYMMETRY-BREAKING POTENTIAL IN STATISTICAL MECHANICS OF LONG-RANGE ORDER [J].