Amorphization kinetics in strontium titanate at 16 and 300 K under argon ion irradiation

Velişa, Gihan; Wendler, Elke; Wang, Liang-Ling; Zhang, Yanwen; Weber, William J.

doi:10.1007/s10853-018-03313-7

Title: Amorphization kinetics in strontium titanate at 16 and 300 K under argon ion irradiation

Journal Article · 08 January 2019 · Journal of Materials Science

DOI: https://doi.org/10.1007/s10853-018-03313-7 · OSTI ID:1491330

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Here, the accumulation of irradiation-induced disorder in SrTiO₃ single crystals irradiated at 16 K with 200 keV Ar ions has been investigated using Rutherford backscattering spectrometry along the < 100 > channeling direction and compared with previous results obtained at 300 K under identical irradiation conditions. As expected, amorphization at 16 K occurs at a much lower fluence than at 300 K due to dynamic recovery of irradiation-induced defects at 300 K. Utilizing a comprehensive damage accumulation model for analysis of the data, irradiation at 16 K results only in the formation of point defects and amorphous pockets, while defect clusters are also formed at 300 K. High defect mobility under irradiation at 300 K tends to promote recombination and clustering of point defects. These results suggest that defect diffusion processes in SrTiO₃ are not thermally active at 16 K.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1491330

Journal Information:: Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 8 Vol. 54; ISSN 0022-2461

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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