Caracterização de materiais semicondutores magnéticos diluídos de composição TiO2 dopados com Co e Sb por espectroscopia de absorção de raios X

• Autor(a) principal: Nascimento, Caio Henrique da Silva
• Data de Publicação: 2022
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/217668
• topic: Titanium dioxide; Diluted magnetic semiconductors; Xray absorption spectroscopy; Dióxido de titânio; Espectroscopia de absorção de raios X; Semicondutores magnéticos diluídos

With the advance of spintronics, the search for new materials to create electronic devices was growing, and so it was necessary to produce a material that by itself, uses this technology. Diluted magnetic semiconductors (SMDs) were the answer to this need. SMDs have ferromagnetic (coming from ions of some transition metal) and semiconducting properties, being perfect for new electronic devices. The SMD studied in this work is of titanium dioxide (TiO2) composition with cobalt (Co) doping, for magnetic characteristics, and antimony (Sb), for structure disorder. The samples were doped with 3% Co and with different concentrations of Sb (4%, 8%, 12% and 16%). The data were obtained using X-ray absorption spectroscopy and then treated using the MAX package and FEFF. With the data obtained, it was possible to show the distance between neighboring atoms, the number of neighboring atoms, the structure of the material and with this, observe how doping can affect these results.