Treffer: Structure and surface morphology of Mn-implanted TiO2
Institut für Physik der Kondensierten Materie, Technishe Universität Braunschweig, Germany
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Weitere Informationen
A study of structure and surface morphology together with magnetic properties of Mn-implanted rutile-type TiO2 single crystals is performed. Homogenous thin films of about 100 nm with different MnxTi1-xO2(x=0.03; 0.05 and 0.07) chemical formula were obtained. The Mn ion implanted surface exhibited a dense microstructure with a nano grain size. The dependence of cla axial ratio on manganese content suggests that Mn3+ species substituted tetragonal Ti4+. The annealing at 873 K caused changes in surface structure, morphology and roughness. A migration of manganese ions into the rutile single crystal takes place and in certain conditions Ti2O phase occurs. Mn-implanted samples exhibit room temperature ferromagnetism and a Curie temperature of 680 K. Electron spin resonance analysis evidenced that manganese is incorporated by substitution as magnetically isolated Mn4+, Mn3+ and Mn2+ species. At 0.07% contents the Mn3+species may enter in interstitial sites contributing to extinction of substitutional magnetic moment.