Cobalt doped ZnO prepared by electrochemistry: chemistry, morphology, and magnetism

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Pure and cobalt-doped ZnO films were electrodeposited from zinc and cobalt nitrate aqueous solutions on platinum substrates and investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and magneto-optical Kerr effect (MOKE). X-ray photoelectron spectroscopy revealed a nearly stoichiometric ZnO doped with cobalt whose atomic percentage range between 11 % and 15 % (ratio Co:Zn). Co doping affects strongly the microstructure of the films, for low overpotentials (- 750 and – 800 mV). For samples deposited at the highest overpotential (- 850 mV) the microstructure is less affected, the Co content is the lowest and these samples exhibit room temperature ferromagnetism.

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Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2009: Biofuels, Renewable Energy, Coatings, Fluidics and Compact Modeling
Published: May 3, 2009
Pages: 231 - 234
Industry sector: Advanced Materials & Manufacturing
Topic: Coatings, Surfaces & Membranes
ISBN: 978-1-4398-1784-1