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Structural phase transformation through defect cluster growth in Gd-doped ceria

Zhi-Peng Li, Toshiyuki Mori, Fei Ye, Ding Rong Ou, Jin Zou, and John Drennan
Phys. Rev. B 84, 180201(R) – Published 7 November 2011
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Abstract

Defect clusters with ordered structures in Gd-doped ceria have been verified by transmission electron microscopy. Atomistic simulation validates further the ordered structures and related pathway for cluster growth. A unique dumbbell structure formed with six oxygen vacancies in a ceria matrix has been identified as the building block for defect cluster growth and sequentially for the evolution from a F- to C-type lattice. As such, the phase transformation as established on the atomic scale occurs through this defect cluster growth.

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  • Received 31 July 2011

DOI:https://doi.org/10.1103/PhysRevB.84.180201

©2011 American Physical Society

Authors & Affiliations

Zhi-Peng Li1,*, Toshiyuki Mori1, Fei Ye2, Ding Rong Ou3, Jin Zou4,5, and John Drennan5

  • 1Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
  • 2Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning 116024, People's Republic of China
  • 3Laboratory of Fuel Cells, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, People's Republic of China
  • 4Division of Materials, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
  • 5Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia

  • *Corresponding author: zhipeng@email.unc.edu; present address: Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255.

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Vol. 84, Iss. 18 — 1 November 2011

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