Damage accumulation and amorphization in samarium titanate pyrochlore

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

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Damage accumulation in Sm2Ti2O7 single crystals irradiated with Au2+ ions at 170, 300 and 700 K was studied by Rutherford backscattering spectrometry using a 2.0 MeV He+ beam along the 〈001〉 channeling direction. The relative disorder on the Sm sublattice follows a nonlinear dependence on ion fluence. The nonlinear behavior is described well by a disorder accumulation model that indicates a predominant role of a defect-stimulated amorphization process. The critical dose for amorphization at 300 K is ∼0.14 dpa, which is in good agreement with in situ transmission electron microscopy results for polycrystalline Sm 2Ti2O7 irradiated with 600 keV Bi+ ions and with Gd2Ti2O7 doped with 244Cm. Despite the six orders of magnitude difference in damage rates, the good agreement between the amorphization doses in Sm 2Ti2O7 at 300 K and 244Cm-doped Gd2Ti2O7 at 340 K indicates that damage accumulation at these temperatures is relatively independent of dose rate.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume218
Issue number1-4
DOIs
Publication statusPublished - Jun 2004
Externally publishedYes

Fingerprint

Samarium
Amorphization
samarium
Ions
damage
dosage
disorders
ions
Rutherford backscattering spectroscopy
Spectrometry
sublattices
backscattering
fluence
Single crystals
Transmission electron microscopy
Defects
transmission electron microscopy
single crystals
defects
spectroscopy

Keywords

  • Amorphization
  • Damage accumulation
  • Irradiation
  • Rutherford backscattering spectroscopy
  • Samarium titanate pyrochlore

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

Damage accumulation and amorphization in samarium titanate pyrochlore. / Zhang, Y.; Shutthanandan, V.; Devanathan, R.; Thevuthasan, S.; McCready, D. E.; Young, J.; Balakrishnan, G.; Paul, D. M.; Weber, W. J.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 218, No. 1-4, 06.2004, p. 89-94.

Research output: Contribution to journalArticle

Zhang, Y, Shutthanandan, V, Devanathan, R, Thevuthasan, S, McCready, DE, Young, J, Balakrishnan, G, Paul, DM & Weber, WJ 2004, 'Damage accumulation and amorphization in samarium titanate pyrochlore', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 218, no. 1-4, pp. 89-94. https://doi.org/10.1016/j.nimb.2003.12.003
Zhang, Y. ; Shutthanandan, V. ; Devanathan, R. ; Thevuthasan, S. ; McCready, D. E. ; Young, J. ; Balakrishnan, G. ; Paul, D. M. ; Weber, W. J. / Damage accumulation and amorphization in samarium titanate pyrochlore. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2004 ; Vol. 218, No. 1-4. pp. 89-94.
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