PST thin films for electrocaloric coolers

被引：92

作者：

Correia, T. M. ^{[1
]}

Kar-Narayan, S. ^{[2
]}

Young, J. S. ^{[2
]}

Scott, J. F. ^{[3
]}

Mathur, N. D. ^{[2
]}

Whatmore, R. W. ^{[4
]}

Zhang, Q. ^{[1
]}

机构：

[1] Cranfield Univ, Dept Mat, Cranfield MK43 OAL, Beds, England

[2] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

[3] Univ Cambridge, Dept Phys, Cavendish Lab, Cambridge CB3 0HE, England

[4] Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2011年 / 44卷 / 16期

基金：

英国工程与自然科学研究理事会;

关键词：

LEAD SCANDIUM TANTALATE; DISORDER;

D O I：

10.1088/0022-3727/44/16/165407

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Relaxor behaviour in a thin film of partially ordered PbSc0.5Ta0.5O3 (PST) was confirmed via slim P-E loops and the frequency dependence of the temperature at which the dielectric constant is maximum. Indirect measurements of the electrocaloric effect suggest that removing a field of 774 kV cm(-1) yields a temperature change of -3.5 degrees C to -6.9 degrees C over a broad range of operating temperatures near room temperature (1-127 degrees C), with a correspondingly large refrigerant capacity of 662 J kg(-1). In addition to low electrical hysteresis, there is negligible thermal hysteresis. PST thin films are therefore promising for EC cooling near room temperature.

引用

页数：4

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