Magnetic characterization of ferrihydrite nanoparticles synthesized by hydrolysis of Fe metal-organic precursor - Lima Junior, E; Arelaro, A D; Rechenberg, Hercilio Rodolfo; Duarte, E L; Itri, Rosangela; Cavelius, C; Shen, H; Mathur, S; Goya, G R (Physica B-Condensed Matter, 2008)