Electrical conductivity of epitaxial La0.6Sr0.4Co0.2Fe0.8O3-δ thin films grown by pulsed laser deposition

被引：39
作者：
Zomorrodian, Ali [1 ]
Salamati, Hadi [2 ]
Lu, Zigui [3 ]
Chen, Xin [1 ]
Wu, Naijuan [1 ]
Ignatiev, Alex [1 ]
机构：
[1] Univ Houston, Ctr Adv Mat, Houston, TX 77204 USA
[2] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran
[3] Pacific NW Natl Lab, Environm & Energy Directorate, Richland, WA 99352 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 22期
关键词：
Epitaxial thin film; Electrical conductivity; Surface exchange coefficient; Relaxation; CHEMICAL DIFFUSION; SURFACE EXCHANGE; OXYGEN-EXCHANGE; FUEL-CELL; RELAXATION; TRANSPORT; ION; COEFFICIENT; YSZ;
D O I：
10.1016/j.ijhydene.2010.08.100
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Epitaxial La0 6Sr0 Co-4(0) Fe-2(0) O-8(3-delta) (LSCF) thin films have been grown successfully on single crystal LaAlO3 substrate by pulsed laser deposition (PLD) AFM micrographs have shown a rms roughness of 5A for the 550 degrees C deposited films The films further exhibited electrical conductivities of as high as 2 3 x 10(3) S cm(-1) at 600 degrees C with an activation energy of 0 09 eV The surface exchange coefficient (k(chem)) of the epitaxial LSCF thin film determined by electrical conductivity relaxation (ECR) technique increased with the increasing temperature and reached a value of similar to 5 1 x 10(-6) S cm(-1) at temperatures above 620 C (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved
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页码：12443 / 12448
页数：6
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