Studying the Effect of Cobalt Doping on Optical and Magnetic Properties of Zinc Oxide Nanoparticles

Studying the Effect of Cobalt Doping on Optical and Magnetic Properties of Zinc Oxide Nanoparticles Nano-crystalline powders of Zn Co O with (0.0 ≤ x ≤ 0.07) have been synthesized by sol-gel method. X-ray diffraction 1−x x patterns of the prepared samples confirm the formation of pure single phase hexagonal crystalline structure without any secondary phases were detected. The crystallite size was calculated from the X-ray data analysis, it was decreased by increasing the cobalt concentration. The hexagonal shape of the Co doped ZnO samples was confirmed using the micrographs of the high-resolution transmission electron microscope. Vibrational spectra of prepared samples shows a −1 stretching mode at 426 cm , which was assigned to the ZnO complex using Fourier transforms infrared spectra. The energy band gap was calculated using the diffuse reflectance measurements and it was found depending on cobalt dopant ions. Finally the magnetic properties were carried out using a vibrating sample magnetometer. The M-H loops showed ferromagnetic behavior for all Cobalt concentrations doped ZnO at room temperature and diamagnetic behavior for pure ZnO. Keywords Diluted magnetic semiconductors · Nano-crystalline doped ZnO · XRD · FTIR · UV diffuse reflectance · Magnetic properties 1 Introduction materials attract more attention due to their large energy gap such as titanium oxide which has a large http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Silicon Springer Journals

Studying the Effect of Cobalt Doping on Optical and Magnetic Properties of Zinc Oxide Nanoparticles

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Publisher
Springer Netherlands
Copyright
Copyright © 2018 by Springer Science+Business Media B.V., part of Springer Nature
Subject
Chemistry; Inorganic Chemistry; Materials Science, general; Optics, Lasers, Photonics, Optical Devices; Environmental Chemistry; Polymer Sciences
ISSN
1876-990X
eISSN
1876-9918
D.O.I.
10.1007/s12633-018-9902-4
Publisher site
See Article on Publisher Site

Abstract

Nano-crystalline powders of Zn Co O with (0.0 ≤ x ≤ 0.07) have been synthesized by sol-gel method. X-ray diffraction 1−x x patterns of the prepared samples confirm the formation of pure single phase hexagonal crystalline structure without any secondary phases were detected. The crystallite size was calculated from the X-ray data analysis, it was decreased by increasing the cobalt concentration. The hexagonal shape of the Co doped ZnO samples was confirmed using the micrographs of the high-resolution transmission electron microscope. Vibrational spectra of prepared samples shows a −1 stretching mode at 426 cm , which was assigned to the ZnO complex using Fourier transforms infrared spectra. The energy band gap was calculated using the diffuse reflectance measurements and it was found depending on cobalt dopant ions. Finally the magnetic properties were carried out using a vibrating sample magnetometer. The M-H loops showed ferromagnetic behavior for all Cobalt concentrations doped ZnO at room temperature and diamagnetic behavior for pure ZnO. Keywords Diluted magnetic semiconductors · Nano-crystalline doped ZnO · XRD · FTIR · UV diffuse reflectance · Magnetic properties 1 Introduction materials attract more attention due to their large energy gap such as titanium oxide which has a large

Journal

SiliconSpringer Journals

Published: Jun 5, 2018

References

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