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Magnetic and transport properties of transition-metal implanted ZnO single crystals

Author

Listed:
  • R. P. Borges
  • B. Ribeiro
  • A. R.G. Costa
  • C. Silva
  • R. C. da Silva
  • G. Evans
  • A. P. Gonçalves
  • M. M. Cruz
  • M. Godinho

Abstract

ZnO single crystals were implanted with Mn, Co and Ni with fluences between 1 × 10 16 cm -2 and 1 × 10 17 cm -2 and energy of 200 keV. Results indicate that aggregation of transition metal ions in the as implanted state occurs only in the case of Ni. After an annealing stage to recover the ZnO structure aggregation occurs for the higher fluences of all implanted species. For lower concentrations paramagnetic behaviour with magnetic moments close to those of individual ions is observed. No polarised impurity band is formed as a result of the presence of transition metal ions and all samples show electrical conduction by carriers in extended states of ZnO. Significant values of magnetoresistance are measured at low temperatures, where electrical transport is described by hopping mechanisms between localized states. The sign of the magnetoresistance is dependent of the doping ion and is correlated with the observed aggregation. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Suggested Citation

  • R. P. Borges & B. Ribeiro & A. R.G. Costa & C. Silva & R. C. da Silva & G. Evans & A. P. Gonçalves & M. M. Cruz & M. Godinho, 2011. "Magnetic and transport properties of transition-metal implanted ZnO single crystals," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 79(2), pages 185-195, January.
    • Handle: RePEc:spr:eurphb:v:79:y:2011:i:2:p:185-195:10.1140/epjb/e2010-10512-3
    DOI: 10.1140/epjb/e2010-10512-3
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    Cited by:

    1. Aleksandra Sazhina, 2018. "Residents’ Coproduction Activities As The Basis Of Urban Development: The Case Of The Football World Cup In Volgograd," HSE Working papers WP BRP 07/URB/2018, National Research University Higher School of Economics.

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