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Title: Insights on dramatic radial fluctuations in track formation by energetic ions

Abstract

We discuss the insights on the unexpected dramatic radial variations in the ion tracks formed by energetic ion (2.3 GeV 208Pb) irradiation at a constant electronic energy-loss (~42 keV/nm) in pyrochlore structured Gd2TiZrO7. Though previous studies have shown track formation and average track diameter measurements, this work brings further clarity on why quantitative analysis of ion track formation in Gd2TixZr(1-x)O7 systems can be more complicated than the currently accepted behavior for ion tracks. The ion track profile is usually considered to be diametrically uniform at constant values of the electronic energy-loss. This study shows the diameter variations to be as large as ~40% within an extremely short incremental track length of ~20 nm. Our molecular dynamics simulations show that these fluctuations in diameter of amorphous core and overall track diameter are attributed to (i) the stochastic nature of inelastic energy loss along the track and (ii) the random substitution of Ti atoms by Zr atoms on the B-site in the pyrochlore lattice. Furthermore, the partial substitution of Ti by Zr increases the favorability of the defect-fluorite structure formation over amorphous phase stochastically, by introducing localized inhomogeneity in atomic structure, density and strain.

Authors:
 [1];  [2];  [3];  [4];  [1];  [4];  [1]
+ Show Author Affiliations
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. GSI-Hemholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Technische Univ. Darmstadt, Darmstadt (Germany)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1255685
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 36 MATERIALS SCIENCE; ion track; pyrochlore; STEM; molecular dynamics

Citation Formats

Sachan, Ritesh, Lang, Maik, Trautmann, Christina, Zhang, Yanwen, Chisholm, Matthew F., Weber, William J., and Zarkadoula, Eva. Insights on dramatic radial fluctuations in track formation by energetic ions. United States: N. p., 2016. Web. doi:10.1038/srep27196.
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Sachan, Ritesh, Lang, Maik, Trautmann, Christina, Zhang, Yanwen, Chisholm, Matthew F., Weber, William J., & Zarkadoula, Eva. Insights on dramatic radial fluctuations in track formation by energetic ions. United States. https://doi.org/10.1038/srep27196
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Sachan, Ritesh, Lang, Maik, Trautmann, Christina, Zhang, Yanwen, Chisholm, Matthew F., Weber, William J., and Zarkadoula, Eva. Thu . "Insights on dramatic radial fluctuations in track formation by energetic ions". United States. https://doi.org/10.1038/srep27196. https://www.osti.gov/servlets/purl/1255685.
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@article{osti_1255685,
title = {Insights on dramatic radial fluctuations in track formation by energetic ions},
author = {Sachan, Ritesh and Lang, Maik and Trautmann, Christina and Zhang, Yanwen and Chisholm, Matthew F. and Weber, William J. and Zarkadoula, Eva},
abstractNote = {We discuss the insights on the unexpected dramatic radial variations in the ion tracks formed by energetic ion (2.3 GeV 208Pb) irradiation at a constant electronic energy-loss (~42 keV/nm) in pyrochlore structured Gd2TiZrO7. Though previous studies have shown track formation and average track diameter measurements, this work brings further clarity on why quantitative analysis of ion track formation in Gd2TixZr(1-x)O7 systems can be more complicated than the currently accepted behavior for ion tracks. The ion track profile is usually considered to be diametrically uniform at constant values of the electronic energy-loss. This study shows the diameter variations to be as large as ~40% within an extremely short incremental track length of ~20 nm. Our molecular dynamics simulations show that these fluctuations in diameter of amorphous core and overall track diameter are attributed to (i) the stochastic nature of inelastic energy loss along the track and (ii) the random substitution of Ti atoms by Zr atoms on the B-site in the pyrochlore lattice. Furthermore, the partial substitution of Ti by Zr increases the favorability of the defect-fluorite structure formation over amorphous phase stochastically, by introducing localized inhomogeneity in atomic structure, density and strain.},
doi = {10.1038/srep27196},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Thu Jun 02 00:00:00 EDT 2016},
month = {Thu Jun 02 00:00:00 EDT 2016}
}
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https://doi.org/10.1038/srep27196
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Ion irradiation effects in nonmetals: formation of nanocrystals and novel microstructures
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  • Materials Research Innovations, Vol. 3, Issue 4
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The role of electronic energy loss in ion beam modification of materials
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Radiation damage of electronic components in space environment
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Swift heavy ion track formation in Gd2Zr2−Ti O7 pyrochlore: Effect of electronic energy loss
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Crystal structure, hydration and ionic conductivity of the inherently oxygen-deficient La2Ce2O7
journal, November 2012

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journal, August 1997

Time-reversal symmetry breaking and spontaneous Hall effect without magnetic dipole order
journal, December 2009

  • Machida, Yo; Nakatsuji, Satoru; Onoda, Shigeki
  • Nature, Vol. 463, Issue 7278
  • DOI: 10.1038/nature08680

Synergy of elastic and inelastic energy loss on ion track formation in SrTiO3
journal, January 2015

  • Weber, William J.; Zarkadoula, Eva; Pakarinen, Olli H.
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep07726

Enhanced radiation resistance of nanocrystalline pyrochlore Gd2(Ti0.65Zr0.35)2O7
journal, June 2009

  • Zhang, Jiaming; Lian, Jie; Fuentes, Antonio F.
  • Applied Physics Letters, Vol. 94, Issue 24
  • DOI: 10.1063/1.3155855

Phase transformations induced by high electronic excitation in ion-irradiated Gd2(ZrxTi1−x)2O7 pyrochlores
journal, November 2010

  • Sattonnay, G.; Moll, S.; Thomé, L.
  • Journal of Applied Physics, Vol. 108, Issue 10
  • DOI: 10.1063/1.3503452

Structure and band gap determination of irradiation-induced amorphous nano-channels in LiNbO 3
journal, April 2015

  • Sachan, R.; Pakarinen, O. H.; Liu, P.
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  • DOI: 10.1063/1.4915932

Multi-scale simulation of structural heterogeneity of swift-heavy ion tracks in complex oxides
journal, March 2013

Aberration-corrected scanning transmission electron microscopy: from atomic imaging and analysis to solving energy problems
journal, September 2009

  • Pennycook, S. J.; Chisholm, M. F.; Lupini, A. R.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 367, Issue 1903
  • DOI: 10.1098/rsta.2009.0112

Disorder in Pyrochlore Oxides
journal, August 2000

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    Works referencing / citing this record:

    Energetic Ion Irradiation-Induced Disordered Nanochannels for Fast Ion Conduction
    journal, October 2018

    Recrystallization as the governing mechanism of ion track formation
    journal, March 2019

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