Single-ion tracks in Gd2Zr2xTixO7 pyrochlores irradiated with swift heavy ions

Maik Lang, Jie Lian, Jiaming Zhang, Fuxiang Zhang, William J. Weber, Christina Trautmann, and Rodney C. Ewing
Phys. Rev. B 79, 224105 – Published 4 June 2009

Abstract

Swift xenon ions (1.43 GeV) were used to systematically investigate the radiation response of pyrochlores in the Gd2Zr2xTixO7 binary in the electronic energy loss regime. Ion-induced structural modifications were characterized by synchrotron x-ray diffraction, Raman spectroscopy, and transmission electron microscopy. The structure of ion tracks depends on the pyrochlore composition, and the damage cross section increases with the Ti content. In general, single ion tracks consist of an amorphous track core, surrounded by a crystalline, but disordered, defect-fluorite-structured shell. That is in turn surrounded by a defect-rich pyrochlore region. The decrease in the size of these different track zones, with increasing Zr content, is a result of the enhanced radiation stability of Zr-rich pyrochlore within individual swift heavy ion tracks.

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  • Received 11 December 2008

DOI:https://doi.org/10.1103/PhysRevB.79.224105

©2009 American Physical Society

Authors & Affiliations

Maik Lang1, Jie Lian2, Jiaming Zhang1, Fuxiang Zhang1, William J. Weber3, Christina Trautmann4, and Rodney C. Ewing1,*

  • 1Department of Geological Sciences and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
  • 2Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
  • 3Pacific Northwest National Laboratory, Richland, Washington 99352, USA
  • 4GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany

  • *Corresponding author; rodewing@umich.edu

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Vol. 79, Iss. 22 — 1 June 2009

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