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

✍ Scribed by Ali Zomorrodian; Hadi Salamati; Zigui Lu; Xin Chen; Naijuan Wu; Alex Ignatiev

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
768 KB
Volume
35
Category
Article
ISSN
0360-3199

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✦ Synopsis

Epitaxial La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3Àd (LSCF) thin films have been grown successfully on single crystal LaAlO 3 substrate by pulsed laser deposition (PLD). AFM micrographs have shown a rms roughness of 5 A for the 550 C deposited films. The films further exhibited electrical conductivities of as high as 2.3 Â 10 3 S cm À1 at 600 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 w5.1 Â 10 À6 S cm À1 at temperatures above 620 C.

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