EPJ Web of Conferences (Jan 2018)

Influence of oxygen vacancies on magnetic and transport properties of thin Zn1-xCoxOy films

  • Lotin Andrey A.,
  • Kuz’mina Alina S.,
  • Novodvorsky Oleg A.,
  • Parshina Liubov S.,
  • Khramova Olga D.,
  • Mikhalevsky Vladimir A.,
  • Cherebilo Elena A.,
  • Shneider Alexander G.,
  • Perov Nikolay S.,
  • Makarova Liudmila A.

DOI
https://doi.org/10.1051/epjconf/201818506013
Journal volume & issue
Vol. 185
p. 06013

Abstract

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The features of the structural, transport and magnetic properties of thin Zn1-xCoxOy films (x=0-0.45), fabricated on С-sapphire substrates by the pulsed laser deposition method are studied. It is found that the transport and ferromagnetic properties of the wurtzite Zn1-xCoxOy films nonmonotonously depend on Co concentration at room temperature. For the Zn0.87Co0.13Oy film, the strongest ferromagnetic signal is observed that is caused by formation of the greatest number of metallic Co clusters. A further increase of doping impurity concentration in the films leads to the oxidation of metallic Co and formation of the paramagnetic Co3O4 phase, in consequence of which the ferromagnetic signal subsides.