New electric double layered magnetic fluids based on copper, nickel and zinc ferrite nanostructures - Depeyrot, J; Tourinho, F A; Sousa, M H; Figueiredo Neto, Antonio Martins; Magalhães, M; Silva, G J da; Lara, M C F L e (Encontro Nacional de Física da Matéria Condensada, 2001)