Magnetic properties of ZnO:Co layers obtained by pulsed laser deposition method
| Autor: | Ireneusz Stefaniuk, Agnieszka Kościak, I. S. Virt, Iwona Rogalska, B. Cieniek |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Curie temperature 02 engineering and technology ZnO:Co 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Pulsed laser deposition Nanomaterials diluted magnetic semiconductor Mechanics of Materials electron magnetic resonance 0103 physical sciences lcsh:TA401-492 Optoelectronics General Materials Science lcsh:Materials of engineering and construction. Mechanics of materials 010306 general physics 0210 nano-technology business |
| Zdroj: | Materials Science-Poland, Vol 36, Iss 3, Pp 439-444 (2018) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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