The giant electrocaloric effect in EuTiO sub(3) nanowires near room temperature

A phenomenological thermodynamic model is employed to investigate electrocaloric effect in EuTiO sub(3) nanowires, in which the effects of surface tension, gradient external stress, nanowires radius and so on are considered. We are surprised that the decrease in size and the increase in external ten...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2015-11, Vol.649, p.261-266
Main Authors: Wang, Xinyu, Chu, Ruijiang, Dong, Z C, Zhong, C G, Huang, Y Y, Min, Y, Wang, M, Zhou, P X, Yuan, G Q, Wei, Shengnan
Format: Article
Language:English
Subjects:
Adiabatic flow
Alloys
Electric fields
Nanowires
Refrigeration
Surface tension
Tensile stress
Thermodynamic models
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A phenomenological thermodynamic model is employed to investigate electrocaloric effect in EuTiO sub(3) nanowires, in which the effects of surface tension, gradient external stress, nanowires radius and so on are considered. We are surprised that the decrease in size and the increase in external tensile stress can significantly enhance the electrocaloric effect of EuTiO sub(3) nanowires under the same applied electric filed. Giant adiabatic temperature changes ( Delta T = 15-20 K) are achieved near room temperature by controlling the radius of EuTiO sub(3) nanowires and applied external electric fields, which is much higher than the previous results obtained in many other isomorphic electrocaloric materials. The large electrocaloric effects suggest the potential application for micro-nanodevice in refrigeration.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.07.069