skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Revealing ionization-induced dynamic recovery in ion-irradiated SrTiO 3

Abstract

The lack of fundamental understanding on the coupled effects of energy deposition to electrons and atomic nuclei on defect processes and irradiation response poses a significant roadblock for the design and control of material properties. In this work, SrTiO 3 has been irradiated with various ion species over a wide range of ion fluences at room temperature with a goal to deposit different amounts of energy to target electrons and atomic nuclei by varying the ratio of electronic to nuclear energy loss. Here, the results unambiguously show a dramatic difference in behavior of SrTiO 3 irradiated with light ions (Ne, O) compared to heavy ions (Ar). While the damage accumulation and amorphization under Ar ion irradiation are consistent with previous observations and existing models, the damage accumulation under Ne irradiation reveals a quasi-saturation state at a fractional disorder of 0.54 at the damage peak for an ion fluence corresponding to a dose of 0.5 dpa; this is followed by further increases in disorder with increasing ion fluence. In the case of O ion irradiation, the damage accumulation at the damage peak closely follows that for Ne ion irradiation up to a fluence corresponding to a dose of 0.5 dpa, wheremore » a quasi-saturation of fractional disorder level occurs at about 0.48; however, in this case, the disorder at the damage peak decreases slightly with further increases in fluence. This behavior is associated with changes in kinetics due to irradiation-enhanced diffusional processes that are dependent on electronic energy loss and the ratio of electronic to nuclear energy dissipation. Lastly, these findings are critical for advancing the fundamental understanding of ion-solid interactions and for a large number of applications in oxide electronics where SrTiO 3 is a foundational material.« less

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Friedrich Schiller Univ., Jena (Germany). Institut fur Festkorperphysik
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science & Engineering
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science & Engineering
  5. 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:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1425335
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Acta Materialia; Journal Volume: 149
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic energy loss; Nuclear energy loss; Energy deposition and dissipation; Dynamic recovery process; Strontium titanate

Citation Formats

Velisa, Gihan, Wendler, Elke, Xue, Haizhou, Zhang, Yanwen, and Weber, William J. Revealing ionization-induced dynamic recovery in ion-irradiated SrTiO3. United States: N. p., 2018. Web. doi:10.1016/j.actamat.2018.02.038.
Velisa, Gihan, Wendler, Elke, Xue, Haizhou, Zhang, Yanwen, & Weber, William J. Revealing ionization-induced dynamic recovery in ion-irradiated SrTiO3. United States. doi:10.1016/j.actamat.2018.02.038.
Velisa, Gihan, Wendler, Elke, Xue, Haizhou, Zhang, Yanwen, and Weber, William J. Fri . "Revealing ionization-induced dynamic recovery in ion-irradiated SrTiO3". United States. doi:10.1016/j.actamat.2018.02.038.
@article{osti_1425335,
title = {Revealing ionization-induced dynamic recovery in ion-irradiated SrTiO3},
author = {Velisa, Gihan and Wendler, Elke and Xue, Haizhou and Zhang, Yanwen and Weber, William J.},
abstractNote = {The lack of fundamental understanding on the coupled effects of energy deposition to electrons and atomic nuclei on defect processes and irradiation response poses a significant roadblock for the design and control of material properties. In this work, SrTiO3 has been irradiated with various ion species over a wide range of ion fluences at room temperature with a goal to deposit different amounts of energy to target electrons and atomic nuclei by varying the ratio of electronic to nuclear energy loss. Here, the results unambiguously show a dramatic difference in behavior of SrTiO3 irradiated with light ions (Ne, O) compared to heavy ions (Ar). While the damage accumulation and amorphization under Ar ion irradiation are consistent with previous observations and existing models, the damage accumulation under Ne irradiation reveals a quasi-saturation state at a fractional disorder of 0.54 at the damage peak for an ion fluence corresponding to a dose of 0.5 dpa; this is followed by further increases in disorder with increasing ion fluence. In the case of O ion irradiation, the damage accumulation at the damage peak closely follows that for Ne ion irradiation up to a fluence corresponding to a dose of 0.5 dpa, where a quasi-saturation of fractional disorder level occurs at about 0.48; however, in this case, the disorder at the damage peak decreases slightly with further increases in fluence. This behavior is associated with changes in kinetics due to irradiation-enhanced diffusional processes that are dependent on electronic energy loss and the ratio of electronic to nuclear energy dissipation. Lastly, these findings are critical for advancing the fundamental understanding of ion-solid interactions and for a large number of applications in oxide electronics where SrTiO3 is a foundational material.},
doi = {10.1016/j.actamat.2018.02.038},
journal = {Acta Materialia},
number = ,
volume = 149,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2018},
month = {Fri Mar 02 00:00:00 EST 2018}
}