The Electrochemical Oxidation : a New Way for Preparing Highly Oxidized Ferrites J.-C. Grenier, A. Wattiaux, L. Fournes, M. Pouchard and J. Etourneau J. Phys. IV France, 07 C1 (1997) C1-49-C1-52 DOI: 10.1051/jp4:1997107