Structure and surface morphology of Mn-implanted TiO2
| Autor: | Felicia Iacomi, N. Apetroaei, Marius Mihai Cazacu, I. Jursic, Dirk Menzel, Veronica Goian, J. Schoenes, Gh. Zodieriu, C. Scarlat, G. Calin |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Manganese Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Crystallography Tetragonal crystal system Nuclear magnetic resonance chemistry Transition metal Ferromagnetism Interstitial defect Materials Chemistry Curie temperature Single crystal |
| Zdroj: | Thin Solid Films. 515:6402-6406 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2006.11.188 |
| Popis: | 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 c/a axial ratio on manganese content suggests that Mn 3+ species substituted tetragonal Ti 4+ . 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 Mn 4+ ,M n 3+ and Mn 2+ species. At 0.07% contents the Mn 3+ species may enter in interstitial sites contributing |
| Databáze: | OpenAIRE |
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