Effect of Annealing Temperature on the Structural and Magnetic Properties of Co-Doped TiO2 Nanoparticles via Complex-Polymer Sol-Gel Method
2012 (English)In: Journal of Nanoscience and Nanotechnology, ISSN 1533-4880, Vol. 12, no 2, 950-954 p.Article in journal (Refereed) Published
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.
Diluted Magnetic Semiconductors, Sol-Gel Process, X-ray Diffraction, DC Magnetometry, Ferromagnetism in Semiconductor
Engineering and Technology
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-174982DOI: 10.1166/jnn.2012.5155ISI: 000303280000012OAI: oai:DiVA.org:uu-174982DiVA: diva2:529727