Cation ordering in epitaxial lead zirconate titanate films

Zhang, L. C. and Vasiliev, A. L. and Mısırlıoğlu, Burç and Ramesh, R. and Alpay, S. P. and Aindow, M. (2008) Cation ordering in epitaxial lead zirconate titanate films. Applied Physics Letters, 93 (26). ISSN 0003-6951 (Print) 1077-3118 (Online)

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Electron diffraction and atom location by channeling enhanced microanalysis were used to show that epitaxial PbZr0.2Ti0.8O3 films grown on (001) SrTiO3 substrates 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 a(0)approximate to root 2a(PZT) and c(0)approximate to a(PZT). 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.
Item Type: Article
Additional Information: Article Number: 262903
Uncontrolled Keywords: channelling; chemical analysis; electron diffraction; epitaxial layers; ferroelectric materials; ferroelectric thin films; lattice constants; lead compounds; long-range order
Subjects: Q Science > QC Physics > QC1 General
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Burç Mısırlıoğlu
Date Deposited: 18 Jun 2010 10:07
Last Modified: 25 Jul 2019 10:12

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