HIGH FIELD MAGNETIZATION STUDY OF SODIUM-ZINC SPINEL FERRITES X. Obradors, M. Pernet, M. Vallet, A. Isalgué, J. Rodriguez et A. Labarta J. Phys. Colloques, 46 C6 (1985) C6-445-C6-448 DOI: 10.1051/jphyscol:1985686