Amorphization due to electronic energy deposition in defective strontium titanate

Haizhou Xue; Eva Zarkadoula; Peng Liu; Ke Jin; Yanwen Zhang; William J. Weber

doi:10.1016/j.actamat.2017.01.051

Amorphization due to electronic energy deposition in defective strontium titanate

Haizhou Xue, Eva Zarkadoula, Peng Liu, Ke Jin, Yanwen Zhang, William J. Weber

Nanomaterials Theory Institute

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

The synergistic interaction of electronic energy loss by ions with ion-induced defects created by elastic nuclear scattering processes has been investigated for single crystal SrTiO₃. An initial pre-damaged defect state corresponding to a relative disorder level of 0.10–0.15 sensitizes the SrTiO₃ to amorphous track formation along the ion path of 12 and 20 MeV Ti, 21 MeV Cl and 21 MeV Ni ions, where Ti, Cl and Ni ions otherwise do not produce amorphous or damage tracks in pristine SrTiO₃. The electronic stopping power threshold for amorphous ion track formation is found to be 6.7 keV/nm for the pre-damaged defect state studied in this work. These results suggest the possibility of selectively producing nanometer scale, amorphous ion tracks in thin films of epitaxial SrTiO₃.

Original language	English
Pages (from-to)	400-406
Number of pages	7
Journal	Acta Materialia
Volume	127
DOIs	https://doi.org/10.1016/j.actamat.2017.01.051
State	Published - Apr 1 2017

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Haizhou Xue was supported by the University of Tennessee Governor's Chair program. Peng Liu was supported by China Scholarship Council (CSC) overseas scholarship program and by the National Natural Science Foundation of China (Grant No. 11405097) and the Natural Science Foundation of Shandong Province of China (Grant No. ZR2014AQ21).

Funders	Funder number
University of Tennessee Governor
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Division of Materials Sciences and Engineering
National Natural Science Foundation of China	11405097
China Scholarship Council
Natural Science Foundation of Shandong Province	ZR2014AQ21

Keywords

Amorphization
Energy dissipation
Ion track
SrTiO
Stopping power

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10.1016/j.actamat.2017.01.051

Cite this

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title = "Amorphization due to electronic energy deposition in defective strontium titanate",

abstract = "The synergistic interaction of electronic energy loss by ions with ion-induced defects created by elastic nuclear scattering processes has been investigated for single crystal SrTiO3. An initial pre-damaged defect state corresponding to a relative disorder level of 0.10–0.15 sensitizes the SrTiO3 to amorphous track formation along the ion path of 12 and 20 MeV Ti, 21 MeV Cl and 21 MeV Ni ions, where Ti, Cl and Ni ions otherwise do not produce amorphous or damage tracks in pristine SrTiO3. The electronic stopping power threshold for amorphous ion track formation is found to be 6.7 keV/nm for the pre-damaged defect state studied in this work. These results suggest the possibility of selectively producing nanometer scale, amorphous ion tracks in thin films of epitaxial SrTiO3.",

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AU - Xue, Haizhou

AU - Zarkadoula, Eva

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AU - Jin, Ke

AU - Zhang, Yanwen

AU - Weber, William J.

PY - 2017/4/1

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N2 - The synergistic interaction of electronic energy loss by ions with ion-induced defects created by elastic nuclear scattering processes has been investigated for single crystal SrTiO3. An initial pre-damaged defect state corresponding to a relative disorder level of 0.10–0.15 sensitizes the SrTiO3 to amorphous track formation along the ion path of 12 and 20 MeV Ti, 21 MeV Cl and 21 MeV Ni ions, where Ti, Cl and Ni ions otherwise do not produce amorphous or damage tracks in pristine SrTiO3. The electronic stopping power threshold for amorphous ion track formation is found to be 6.7 keV/nm for the pre-damaged defect state studied in this work. These results suggest the possibility of selectively producing nanometer scale, amorphous ion tracks in thin films of epitaxial SrTiO3.

AB - The synergistic interaction of electronic energy loss by ions with ion-induced defects created by elastic nuclear scattering processes has been investigated for single crystal SrTiO3. An initial pre-damaged defect state corresponding to a relative disorder level of 0.10–0.15 sensitizes the SrTiO3 to amorphous track formation along the ion path of 12 and 20 MeV Ti, 21 MeV Cl and 21 MeV Ni ions, where Ti, Cl and Ni ions otherwise do not produce amorphous or damage tracks in pristine SrTiO3. The electronic stopping power threshold for amorphous ion track formation is found to be 6.7 keV/nm for the pre-damaged defect state studied in this work. These results suggest the possibility of selectively producing nanometer scale, amorphous ion tracks in thin films of epitaxial SrTiO3.

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KW - Energy dissipation

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KW - SrTiO

KW - Stopping power

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Amorphization due to electronic energy deposition in defective strontium titanate

Abstract

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Keywords

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