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

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

doi:10.1051/epjconf/201818506013

Proceedings

Open Access

EPJ Web of Conferences 185, 06013 (2018)
https://doi.org/10.1051/epjconf/201818506013

Influence of oxygen vacancies on magnetic and transport properties of thin Zn_1-xCo_xO_y films

Andrey A. Lotin¹^*, Alina S. Kuz’mina², Oleg A. Novodvorsky¹, Liubov S. Parshina¹, Olga D. Khramova¹, Vladimir A. Mikhalevsky¹, Elena A. Cherebilo¹, Alexander G. Shneider², Nikolay S. Perov³ and Liudmila A. Makarova³

¹ Federal Scientific Research Center "Crystallography and Photonics" RAS, 140700, Shatura, Russia
² Irkutsk National Research Technical University, Irkutsk, Russia
³ Lomonosov Moscow State University, Moscow, Russia

^* Correspondingauthor : lotin_82@mail.ru

Published online: 4 July 2018

Abstract

The features of the structural, transport and magnetic properties of thin Zn_1-xCo_xO_y 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 Zn_1-xCo_xO_y films nonmonotonously depend on Co concentration at room temperature. For the Zn_0.87Co_0.13Oy 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.

© The Authors, published by EDP Sciences, 2018

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