Electrocaloric effect in triglycine sulfate under equilibrium and nonequilibrium thermodynamic conditions

被引：10

作者：

Bondarev, V. S. ^{[1
,2
]}

Mikhaleva, E. A. ^{[1
]}

Flerov, I. N. ^{[1
,2
]}

Gorev, M. V. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Fed Res Ctr,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia

[2] Siberian Fed Univ, Krasnoyarsk 660041, Russia

来源：

PHYSICS OF THE SOLID STATE | 2017年 / 59卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

PERIODIC ELECTRIC-FIELD;

D O I：

10.1134/S1063783417060051

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The direct and indirect measurements of intensive electrocaloric effect in a triglycine sulfate ferroelectric crystal are performed under equilibrium and nonequilibrium thermodynamic conditions implemented in the adiabatic calorimeter. The effect of the electric field parameters (frequency, profile, and strength) on the value of the effect and degree of its reversibility are studied. The difference between the temperature variation values in a switched-on and switched-off dc field under quasi-isothermal conditions is established. The low-frequency periodic electric field induces the temperature gradient along the electrocaloric element and heat flux from its free end to the thermostated base. A significant excess of the field switching-off rate over the switching-on rate leads to a noticeable intensification of the cooling effect.

引用

页码：1118 / 1126

页数：9

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