Applied Physics A

, Volume 120, Issue 1, pp 167–173 | Cite as

Depth profiles of indentation hardness and dislocation mobility in MgO single crystals irradiated with swift 84Kr and 14N ions

  • R. Zabels
  • I. Manika
  • K. Schwartz
  • J. Maniks
  • R. Grants
  • M. Sorokin
  • M. Zdorovets
Article

Abstract

The depth dependence of damage and modification of micromechanical properties in MgO single crystals irradiated with 150 MeV 84Kr and 24.5 MeV 14N ions (specific energy 1.75 MeV/u) at fluences up to 1015 ions/cm2 has been studied. The effects of ion-induced increase in hardness and reduction in dislocation mobility, magnitude of which varies along the ion range, were observed. These effects are related to ion-induced dislocations which were revealed by chemical etching. The results confirm a joint contribution of electronic excitations and atomic displacements by elastic collisions in the structural damage of MgO. The excitation mechanism in hardening dominates in the incoming part of ion range (up to the Bragg’s maximum), while the role of impact mechanism becomes dominant only at the end of ion range.

Notes

Acknowledgments

The work has been supported by the ESF project Nr. 2013/0015/1DP/1.1.1.2.0/13/APIA/VIAA/010 and the National Research Program IMIS2.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • R. Zabels
    • 1
  • I. Manika
    • 1
  • K. Schwartz
    • 2
  • J. Maniks
    • 1
  • R. Grants
    • 1
  • M. Sorokin
    • 3
  • M. Zdorovets
    • 4
  1. 1.Institute of Solid State PhysicsUniversity of LatviaRigaLatvia
  2. 2.GSI Helmholtzzentrum für SchwerionenforschungDarmstadtGermany
  3. 3.National Research Centre Kurchatov InstituteMoscowRussia
  4. 4.Institute of Nuclear PhysicsAlmatyKazakhstan

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