<abstract xmlns="http://www.w3.org/1999/xhtml">We have studied magnetic properties of zinc oxide (ZnO) composite doped with Co ions. The samples were obtained by pulsed laser deposition (PLD) method. Electron magnetic resonance (EMR) measurements were carried out and temperature dependence of EMR spectra was obtained. Analysis of temperature dependence of the integral intensity of EMR spectra was carried out using Curie-Weiss law. Reciprocal of susceptibility of an antiferromagnetic (AFM) material shows a discontinuity at the Néel temperature and extrapolation of the linear portion to negative Curie temperature. The results of temperature dependence of EMR spectra for the ZnO:Co sample and linear extrapolation to the Curie-Weiss law indicated the AFM interaction between Co ions characterized by the Néel temperatures TN = 50 K and TN = 160 K for various samples. The obtained g-factor is similar to g-factors of nanocrystals presented in literature, and the results confirm that in the core of these nanocrystals Co was incorporated as Co2+, occupying Zn2+ sites in wurtzite structure of ZnO.</abstract>

We have studied magnetic properties of zinc oxide (ZnO) composite doped with Co ions. The samples were obtained by pulsed laser deposition (PLD) method. Electron magnetic resonance (EMR) measurements were carried out and temperature dependence of EMR spectra was obtained. Analysis of temperature dependence of the integral intensity of EMR spectra was carried out using Curie-Weiss law. Reciprocal of susceptibility of an antiferromagnetic (AFM) material shows a discontinuity at the Néel temperature and extrapolation of the linear portion to negative Curie temperature. The results of temperature dependence of EMR spectra for the ZnO:Co sample and linear extrapolation to the Curie-Weiss law indicated the AFM interaction between Co ions characterized by the Néel temperatures TN = 50 K and TN = 160 K for various samples. The obtained g-factor is similar to g-factors of nanocrystals presented in literature, and the results confirm that in the core of these nanocrystals Co was incorporated as Co2+, occupying Zn2+ sites in wurtzite structure of ZnO.

Magnetic properties of ZnO:Co layers obtained by pulsed laser deposition method

Faculty of Mathematics and Natural Sciences

The Ivan Franko State Pedagogical University in Drohobycz

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Magnetic properties of ZnO:Co layers obtained by pulsed laser deposition method"}

We have studied magnetic properties of zinc oxide (ZnO) composite doped with Co ions. The samples were obtained by pulsed laser deposition (PLD) method....

Magnetic properties of ZnO:Co layers obtained by pulsed laser deposition method

Publié en ligne: 02 nov. 2018

Pages: 439 - 444

Reçu: 13 juil. 2017

Accepté: 15 déc. 2017

DOI: https://doi.org/10.1515/msp-2017-0114

Mots clés
electron magnetic resonance, ZnO:Co, diluted magnetic semiconductor, Curie temperature

© 2018 Ireneusz Stefaniuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Magnetic properties of ZnO:Co layers obtained by pulsed laser deposition method

Publié en ligne: 02 nov. 2018

Pages: 439 - 444

Reçu: 13 juil. 2017

Accepté: 15 déc. 2017

DOI: https://doi.org/10.1515/msp-2017-0114

Mots cléselectron magnetic resonance, ZnO:Co, diluted magnetic semiconductor, Curie temperature

© 2018 Ireneusz Stefaniuk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
electron magnetic resonance, ZnO:Co, diluted magnetic semiconductor, Curie temperature