Damage accumulation and amorphization in samarium titanate pyrochlore
UNSPECIFIED (2004) Damage accumulation and amorphization in samarium titanate pyrochlore. In: 12th International Conference on Radiation Effects in Insulators, Gramado, BRAZIL, AUG 31-SEP 05, 2003. Published in: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 218 pp. 89-94.Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.nimb.2003.12.003
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 similar to0.14 dpa, which is in good agreement with in situ transmission electron microscopy results for polycrystalline Sm2Ti2O7 irradiated with 600 keV Bi+ ions and with Gd2Ti2O7 doped with Cm-244. Despite the six orders of magnitude difference in damage rates, the good agreement between the amorphization doses in Sm2Ti2O7 at 300 K and Cm-244-doped Gd2Ti2O7 at 340 K indicates that damage accumulation at these temperatures is relatively independent of dose rate. (C) 2003 Elsevier B.V. All rights reserved.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS|
|Publisher:||ELSEVIER SCIENCE BV|
|Number of Pages:||6|
|Page Range:||pp. 89-94|
|Title of Event:||12th International Conference on Radiation Effects in Insulators|
|Location of Event:||Gramado, BRAZIL|
|Date(s) of Event:||AUG 31-SEP 05, 2003|
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