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Damage evolution in Au-implanted Ho2Ti2O7 titanate pyrochlore
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Zhang, Yanwen, Jagielski, Jacek, Bae, In-Tae, Xiang, Xia, Thome, Lionel, Balakrishnan, G., Paul, Don McK. and Weber, William J. (2010) Damage evolution in Au-implanted Ho2Ti2O7 titanate pyrochlore. In: 15th International Conference of the Radiation Effects in Insulators, Italy, AUG 30-SEP 04, 2009. Published in: Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, Vol.268 (No.19). pp. 3009-3013. doi:10.1016/j.nimb.2010.05.029 ISSN 0168-583X.
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Official URL: http://dx.doi.org/10.1016/j.nimb.2010.05.029
Abstract
Damage evolution at room temperature in Ho2Ti2O7 single crystals is studied under 1 MeV Au2+ ion irradiation by Rutherford backscattering spectroscopy along the (0 0 1) direction. For a better determination of ion-induced disorder profile, an iterative procedure and a Monte Carlo code (McChasy) were used to analyze ion channeling spectra. A disorder accumulation model, with contributions from the amorphous fraction and the crystalline disorder, is fit to the Ho damage accumulation data. The damage evolution behavior indicates that the relative disorder on the Ho sublattice follows a nonlinear dependence on dose and that defect-stimulated amorphization is the primary amorphization mechanism. Similar irradiation behavior previously was observed in Sm2Ti2O7. A slower damage accumulation rate for Ho2Ti2O7, as compared with damage evolution in Sm2Ti2O7, is mainly attributed to a lower effective cross section for defect-stimulated amorphization. (c) 2010 Elsevier B.V. All rights reserved.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 0168-583X | ||||
Official Date: | 1 October 2010 | ||||
Dates: |
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Volume: | Vol.268 | ||||
Number: | No.19 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 3009-3013 | ||||
DOI: | 10.1016/j.nimb.2010.05.029 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 15th International Conference of the Radiation Effects in Insulators | ||||
Type of Event: | Conference | ||||
Location of Event: | Italy | ||||
Date(s) of Event: | AUG 30-SEP 04, 2009 |
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