Investigation of the Naturally Occurring Magnetic Nanoparticles in Crude Oil by AC Magnetic Susceptibility Experiment. - Moscon, Paulo S.; Pessoa, Marcio S.; Rodrigues, Maria C. R.; Alves, André L.; Flores, Erico M. M.; Passamani, Edson C.; Vicente, Maristela A.; Santos, Maria F. P. (Journal of Superconductivity & Novel Magnetism, 2021)