Magnetic and structural study of electric double-layered ferrofluid with MnFe2O4@gamma-Fe2O3 nanoparticles of different mean diameters: Determination of the magnetic correlation distance - Goncalves, E. S.; Cornejo, Daniel Reinaldo; Oliveira, Cristiano Luis Pinto de; Figueiredo Neto, Antonio Martins; Depeyrot, J.; Tourinho, F. A.; Aquino, R. (PHYSICAL REVIEW E, 2015)