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

doi:10.1016/j.nimb.2003.12.003

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 journal › Conference article › peer-review

21 Scopus citations

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 language	English
Pages (from-to)	89-94
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	218
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nimb.2003.12.003
State	Published - Jun 2004
Externally published	Yes
Event	Proceedings of the Twelfth International Conference on Radiation - Gramado, Brazil Duration: Aug 31 2003 → Sep 5 2003

Keywords

Amorphization
Damage accumulation
Irradiation
Rutherford backscattering spectroscopy
Samarium titanate pyrochlore

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10.1016/j.nimb.2003.12.003

Cite this

Zhang, Y., Shutthanandan, V., Devanathan, R., Thevuthasan, S., McCready, D. E., Young, J., Balakrishnan, G., Paul, D. M., & Weber, W. J. (2004). Damage accumulation and amorphization in samarium titanate pyrochlore. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 218(1-4), 89-94. https://doi.org/10.1016/j.nimb.2003.12.003

@article{2fce02c06afe4012856580e912d9c03b,

title = "Damage accumulation and amorphization in samarium titanate pyrochlore",

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.",

keywords = "Amorphization, Damage accumulation, Irradiation, Rutherford backscattering spectroscopy, Samarium titanate pyrochlore",

author = "Y. Zhang and V. Shutthanandan and R. Devanathan and S. Thevuthasan and McCready, \{D. E.\} and J. Young and G. Balakrishnan and Paul, \{D. M.\} and Weber, \{W. J.\}",

note = "Funding Information: This work was supported by the Division of Materials Sciences \& Engineering, Office of Basic Energy Sciences, US Department of Energy. Support for the accelerator facilities within the Environmental Molecular Sciences Laboratory (EMSL) was provided by the Office of Biological and Environmental Research, US. The Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the US Department of Energy under Contract DE-AC06-76RLO 1830.; Proceedings of the Twelfth International Conference on Radiation ; Conference date: 31-08-2003 Through 05-09-2003",

year = "2004",

month = jun,

doi = "10.1016/j.nimb.2003.12.003",

language = "English",

volume = "218",

pages = "89--94",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier B.V.",

number = "1-4",

}

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

TY - JOUR

T1 - Damage accumulation and amorphization in samarium titanate pyrochlore

AU - Zhang, Y.

AU - Shutthanandan, V.

AU - Devanathan, R.

AU - Thevuthasan, S.

AU - McCready, D. E.

AU - Young, J.

AU - Balakrishnan, G.

AU - Paul, D. M.

AU - Weber, W. J.

N1 - Funding Information: This work was supported by the Division of Materials Sciences & Engineering, Office of Basic Energy Sciences, US Department of Energy. Support for the accelerator facilities within the Environmental Molecular Sciences Laboratory (EMSL) was provided by the Office of Biological and Environmental Research, US. The Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the US Department of Energy under Contract DE-AC06-76RLO 1830.

PY - 2004/6

Y1 - 2004/6

N2 - 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.

AB - 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.

KW - Amorphization

KW - Damage accumulation

KW - Irradiation

KW - Rutherford backscattering spectroscopy

KW - Samarium titanate pyrochlore

UR - https://www.scopus.com/pages/publications/2342533110

U2 - 10.1016/j.nimb.2003.12.003

DO - 10.1016/j.nimb.2003.12.003

M3 - Conference article

AN - SCOPUS:2342533110

SN - 0168-583X

VL - 218

SP - 89

EP - 94

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1-4

T2 - Proceedings of the Twelfth International Conference on Radiation

Y2 - 31 August 2003 through 5 September 2003

ER -

Damage accumulation and amorphization in samarium titanate pyrochlore

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