Influência da morfologia no comportamento magnético em aglomerado de CoTPP

• Ano de defesa: 2022
• Autor(a) principal: Rocha, Alberto José Moreira
• Orientador(a): Oliveira, Adilson Jesus Aparecido de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Carlos; Câmpus São Carlos
• Programa de Pós-Graduação: Programa de Pós-Graduação em Física - PPGF
• Palavras-chave em Português: Caracterização magnética; Caracterização morfológica; Superparamagnetismo; CoTPP
• Palavras-chave em Inglês: Magnetic characterization; Morphologic characterization; Superparamagnetism
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/16308

The study of magnetic properties in organic molecules with transition metals has been intense in recent decades, mainly due to the ease of changing their magnetic behavior, either through the introduction of different types of atoms or through changes due to proximity effects with other materials. This thesis we presents the investigation of the magnetic behavior of samples of Cobalt 5-10-15-20-meso-tetraphenylporphyrin (CoTPP) deposited on SiO2 surface. The results showed high values of magnetic moment which as a consequence, led to the appearance of superparamagnetism in samples with a morphological aspect a few deposit, which suggest an interdependence between the morphology and the magnetic response. With aid of morphological techniques, it was possible to suggest the causes magnetic response. These results indicate the possibility of altering the magnetic behavior from changes in the morphology of the samples.