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Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions

Xue, Haizhou and Zarkadoula, Eva and Sachan, Ritesh and Zhang, Yanwen and Trautmann, Christina and Weber, William J. (2018):
Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions.
In: Acta Materialia, PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND, pp. 351-359, 150, ISSN 13596454,
DOI: 10.1016/j.actamat.2018.03.027,
[Online-Edition: https://doi.org/10.1016/j.actamat.2018.03.027],
[Article]

Abstract

Latent ion tracks created by energetic heavy ions (12 MeV Ti to 946 MeV Au) in single crystal SrTiO3 are investigated using Rutherford backscattering spectrometry and scanning transmission electron microscopy. The results demonstrate that pre-existing irradiation damage, introduced via elastic collision processes, interacts synergistically with the electronic energy deposition from energetic heavy ions to enhance formation of latent ion tracks. The average amorphous cross-section increases with the level of pre-damage and is linearly proportional to the electronic energy loss of the ions, with a slope dependent on the pre-damage level. For the highest energy ions (629 MeV Xe and 946 MeV Au), the tracks are continuous over the pre-damaged depth, but become discontinuous beyond the pre-damaged region. This work provides new understanding and insights on ion-solid interactions that significantly impact the interpretation of latent track formation processes, models of amorphization, and the fabrication of electro-ceramic devices. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Erschienen: 2018
Creators: Xue, Haizhou and Zarkadoula, Eva and Sachan, Ritesh and Zhang, Yanwen and Trautmann, Christina and Weber, William J.
Title: Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions
Language: English
Abstract:

Latent ion tracks created by energetic heavy ions (12 MeV Ti to 946 MeV Au) in single crystal SrTiO3 are investigated using Rutherford backscattering spectrometry and scanning transmission electron microscopy. The results demonstrate that pre-existing irradiation damage, introduced via elastic collision processes, interacts synergistically with the electronic energy deposition from energetic heavy ions to enhance formation of latent ion tracks. The average amorphous cross-section increases with the level of pre-damage and is linearly proportional to the electronic energy loss of the ions, with a slope dependent on the pre-damage level. For the highest energy ions (629 MeV Xe and 946 MeV Au), the tracks are continuous over the pre-damaged depth, but become discontinuous beyond the pre-damaged region. This work provides new understanding and insights on ion-solid interactions that significantly impact the interpretation of latent track formation processes, models of amorphization, and the fabrication of electro-ceramic devices. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Journal or Publication Title: Acta Materialia
Volume: 150
Publisher: PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND
Uncontrolled Keywords: Strontium titanate, Rutherford backscattering spectrometry/channeling, Ion track, Ion-beam processing, Molecular dynamics
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
Date Deposited: 23 Jan 2019 08:55
DOI: 10.1016/j.actamat.2018.03.027
Official URL: https://doi.org/10.1016/j.actamat.2018.03.027
Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, University of Tennessee Governor's Chair program
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