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

Latent ion tracks created by energetic heavy ions (12 MeV Ti to 946 MeV Au) in single crystal SrTiO 3 are investigated in this paper 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. Finally, 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.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3] ; ORCiD logo [4]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science & Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. GSI Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany); Technical Univ. of Darmstadt (Germany)
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science & Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 150; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; strontium titanate; Rutherford backscattering spectrometry/channeling; ion track; ion-beam processing; molecular dynamics
OSTI Identifier:
1432154

Xue, Haizhou, Zarkadoula, Eva, Sachan, Ritesh, Zhang, Yanwen, Trautmann, Christina, and Weber, William J. Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions. United States: N. p., Web. doi:10.1016/j.actamat.2018.03.027.
Xue, Haizhou, Zarkadoula, Eva, Sachan, Ritesh, Zhang, Yanwen, Trautmann, Christina, & Weber, William J. Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions. United States. doi:10.1016/j.actamat.2018.03.027.
Xue, Haizhou, Zarkadoula, Eva, Sachan, Ritesh, Zhang, Yanwen, Trautmann, Christina, and Weber, William J. 2018. "Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions". United States. doi:10.1016/j.actamat.2018.03.027.
@article{osti_1432154,
title = {Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ions},
author = {Xue, Haizhou and Zarkadoula, Eva and Sachan, Ritesh and Zhang, Yanwen and Trautmann, Christina and Weber, William J.},
abstractNote = {Latent ion tracks created by energetic heavy ions (12 MeV Ti to 946 MeV Au) in single crystal SrTiO3 are investigated in this paper 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. Finally, 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.},
doi = {10.1016/j.actamat.2018.03.027},
journal = {Acta Materialia},
number = ,
volume = 150,
place = {United States},
year = {2018},
month = {3}
}