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Researchers at Gebze Institute of Technology Have Reported New Data on Zinc Oxide Nanotechnology (The structural and magnetic properties of Co+...

August 15, 2014

Researchers at Gebze Institute of Technology Have Reported New Data on Zinc Oxide Nanotechnology (The structural and magnetic properties of Co+ implanted ZnO films)

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Nanotechnology are discussed in a new report. According to news reporting out of Gebze, Turkey, by NewsRx editors, research stated, "We fabricated 400 nm thick ZnO films by RF magnetron sputtering on Si (1 0 0) substrates. The eight samples were implanted by 40 keV Co+ ions at different fluences varying from 0.25 x 10(17) ions/cm(2) to 2.0 x 10(17) ions/cm(2)."

Our news journalists obtained a quote from the research from the Gebze Institute of Technology, "The XRD technique was applied to analyze the crystal structure of virgin and implanted samples. X-ray patterns show that the virgin sample has reflection peaks that originate from the (1 0 0) and (0 0 2) crystal planes. The Co+ implantation decreased the long range crystal quality and caused the formation of CO3O4 crystallites at remarkable magnitudes in the ZnO films. The theoretical analysis of the XRD data by applying Scherrer method showed that the average crystallite size dropped from 59 nm to 25 nm for ZnO samples after implantation. The magnetic properties of films were investigated by using Vibrating Sample Magnetometry (VSM). The M-H hysteresis curves of samples were recorded at room temperature and 10 K. In order to check the temperature dependence of the magnetization, we carried out field cooled (FC) and zero field cooled (ZFC) M-Tmeasurements in a temperature range of 10-400 K. These measurements showed that the implanted samples exhibit ferromagnetic behavior at room temperature and have T-c value above 1000 K. The magnetization increased with the increasing Co fluence. However, the formation of antiferromagnetic CO3O4 decreased the magnitude of magnetization. The electric conductivity of films was measured by the Four Point Probe method."

According to the news editors, the research concluded: "The electric conductivity depends on the concentration of Co ions."

For more information on this research see: The structural and magnetic properties of Co+ implanted ZnO films. Applied Surface Science, 2014;310():235-241. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Applied Surface Science -

Our news journalists report that additional information may be obtained by contacting S. Guner, Gebze Inst Technol, Dept. of Phys, TR-41400 Gebze, Turkey. Additional authors for this research include O. Gurbuz, S. Caliskan, V.I. Nuzhdin, R. Khaibullin, M. Ozturk and N. Akdogan (see also Nanotechnology).

Keywords for this news article include: Gebze, Turkey, Eurasia, Zinc Oxide, Nanotechnology

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Source: Science Letter

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