Damage evolution and annealing of Au-irradiated samarium titanate pyrochlore

Y. Zhang, V. Shutthanandan, S. Thevuthasan, D. E. McCready, J. Young, R. Devanathan, J. Andreasen, G. Balakrishnan, D. M. Paul, W. J. Weber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Damage evolution and thermal recovery of 1 MeV Au 2+ irradiated samarium titanate pyrochlore (Sm 2Ti 2O 7) single crystals were studied by Rutherford backscattering spectroscopy and nuclear reaction analysis. The damage accumulation follows a nonlinear dependence on dose that is well described by a disorder accumulation model, which indicates a predominant role of defect-stimulated amorphization processes. The critical dose for amorphization at 170 and 300 K is ∼0.14 dpa, and a higher dose of ∼ 0.22 dpa is observed for irradiation at 700 K, which agrees with previous in-situ transmission electron microscopy (TEM) data for polycrystalline Sm 2Ti 2O 7. Annealing in an 18O environment reveals a damage recovery stage at ∼ 850 K that coincides with a significant increase in 18O exchange due to oxygen vacancy mobility. This thermal recovery stage is also consistent with the critical temperature for amorphization measured by in-situ TEM in polycrystalline samples.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsL.-M. Wang, R. Fromknecht, L.L. Snead, D.F. Downey, H. Takahashi
Pages69-74
Number of pages6
Volume792
Publication statusPublished - 2003
Externally publishedYes
EventRadiation Effects and Ion-Beam Processing of Materials - Boston, MA., United States
Duration: 1 Dec 20035 Dec 2003

Other

OtherRadiation Effects and Ion-Beam Processing of Materials
CountryUnited States
CityBoston, MA.
Period1/12/035/12/03

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Zhang, Y., Shutthanandan, V., Thevuthasan, S., McCready, D. E., Young, J., Devanathan, R., Andreasen, J., Balakrishnan, G., Paul, D. M., & Weber, W. J. (2003). Damage evolution and annealing of Au-irradiated samarium titanate pyrochlore. In L-M. Wang, R. Fromknecht, L. L. Snead, D. F. Downey, & H. Takahashi (Eds.), Materials Research Society Symposium - Proceedings (Vol. 792, pp. 69-74)