Effects of crystallographic orientation on the oxygen exchange rate of La0.7Sr0.3MnO3 thin films

  • Yan L
  • Balasubramaniam K
  • Wang S
 et al. 
  • 20

    Readers

    Mendeley users who have this article in their library.
  • N/A

    Citations

    Citations of this article.

Abstract

The oxygen surface exchange of La0.7Sr0.3MnO 3 (LSM) thin films was investigated using the electrical conductivity relaxation (ECR) method. Epitaxial (100)-, (110)-, and (111)-oriented LSM films were fabricated on corresponding SrTiO3 (STO) substrates using pulsed laser deposition. The LSM films had well-controlled surface qualities, exhibited bulk-like steady-state electrical properties, and exhibited surface dominated responses in ECR. The chemical surface exchange coefficients (k chem) were determined and varied from ??? 1 ?? 10- 6 to 65 ?? 10- 6 cm/s, depending on temperature and orientation, with activation energies of between 0.8 and 1.2 eV. At 800 ??C, a four fold variation is observed in the kchem values, with (110)/(100) being the highest/lowest, explained well by the high activation energy for (110), ??? 1.16 eV, and the low energy for (111) and (100), ???0.83 eV. ?? 2011 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • (La
  • Solid oxide fuel cells
  • Sr)MnO3
  • Surface exchange
  • Thin films

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Lu Yan

  • K.R. R. Balasubramaniam

  • Shanling Wang

  • Hui Du

  • Paul a. Salvador

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free