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Cation ordering in epitaxial lead zirconate titanate films

Publication Type

Journal Article

Authors

Zhang, L.C, A.L Vasiliev, I.B Misirlioglu, Ramamoorthy Ramesh, S.P Alpay, M Aindow

DOI

10.1063/1.3058755

Abstract

Electron diffraction and atom location by channeling enhanced microanalysis were used to show that epitaxial PbZr0.2Ti0.8O3films grown on (001) SrTiO3substrates by pulsed laser deposition exhibit long-range order on the tetravalent cation sublattice parallel to the film/substrate interface. This ordering gives two distinct tetravalent cation sites, one Zr lean and one Zr rich, and results in a superlattice with a tetragonal unit cell with lattice parameters a0 ≈2 aPZT and c0 ≈ aPZT. Since such ordered states are inherently unstable in homovalent perovskite solutions, it is inferred that the ordering arises in response to the lattice misfit and could constitute an additional relaxation mode. © 2008 American Institute of Physics.

Journal

Applied Physics Letters

Volume

Year of Publication

2008

ISSN

00036951

Notes

cited By 5

Research Areas

Ramesh Lab