Structure determination of a brownmillerite Ca2Co2O5 thin film by Precession Electron Diffraction

P. Boullay; V. Dorcet; O. Perez; C. Grygiel; W. Prellier; B. Mercey; M. Hervieu

doi:10.1103/PhysRevB.79.184108

Structure determination of a brownmillerite Ca2Co2O5 thin film by Precession Electron Diffraction

Materials Science 2009-05-13 v1

Authors: P. Boullay , V. Dorcet , O. Perez , C. Grygiel , W. Prellier , B. Mercey , M. Hervieu

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Calcium cobaltite thin films with a ratio Ca/Co=1 were grown on (101)-NdGaO3 substrate by the pulsed laser deposition technique. The structure of the deposited metastable phase is solved using a precession electron diffraction 3D dataset recorded from a cross-sectional sample. It is shown that an ordered oxygen-deficient Ca2Co2O5+d perovskite of the brownmillerite-type with lattice parameters a= 0.546nm, b=1.488nm and c=0.546nm (SG: Ibm2) has been stabilized using the substrate induced strain. The structure and microstructure of this metastable cobaltite is further discussed and compared to related bulk materials based on our transmission electron microscopy investigations

Keywords

thin films thin film physics epitaxial thin films

Cite

@article{arxiv.0904.0849,
  title  = {Structure determination of a brownmillerite Ca2Co2O5 thin film by Precession Electron Diffraction},
  author = {P. Boullay and V. Dorcet and O. Perez and C. Grygiel and W. Prellier and B. Mercey and M. Hervieu},
  journal= {arXiv preprint arXiv:0904.0849},
  year   = {2009}
}

Comments

13 pages, 10 figures, 2 tables, accepted in Phys. Rev. B

Structure determination of a brownmillerite Ca2Co2O5 thin film by Precession Electron Diffraction

Abstract

Keywords

Cite

Comments

Related papers