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Effect of Annealing Temperature on the Structural and Magnetic Properties of Co-Doped TiO2 Nanoparticles via Complex-Polymer Sol-Gel Method
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2012 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, Vol. 12, no 2, 950-954 p.Article in journal (Refereed) Published
Abstract [en]

Co-doped TiO2 nanoparticles were synthesized via non hydrous complex-polymer sol gel method. A series of Co-x:Ti1-xO2 samples with x = 0.01, 0.03, 0.05, 0.08 and 0.10, were prepared and subsequently annealed at 400 degrees, 600 degrees and 800 degrees C. Structural and magnetic properties of Co-x:Ti1-xO2 have been studied by means of X-ray diffraction and DC magnetometry. All samples annealed at 400 degrees C show a paramagnetic behavior with an average grain size of 11 nm. With increasing annealing temperatures a complete crystallization is seen with growth of the cluster size up to 31 nm with clear evidence of a presence of CoTiO3. For all concentrations and annealing conditions no sign of a metallic phase, even at x = 0.10, is seen.

Place, publisher, year, edition, pages
2012. Vol. 12, no 2, 950-954 p.
Keyword [en]
Diluted Magnetic Semiconductors, Sol-Gel Process, X-ray Diffraction, DC Magnetometry, Ferromagnetism in Semiconductor
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
URN: urn:nbn:se:uu:diva-174982DOI: 10.1166/jnn.2012.5155ISI: 000303280000012OAI: oai:DiVA.org:uu-174982DiVA: diva2:529727
Available from: 2012-05-31 Created: 2012-05-30 Last updated: 2012-09-21Bibliographically approved

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Wikberg, J. MagnusSvedlindh, Peter
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Materials PhysicsSolid State Physics
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