J. Phys. IV France 07 (1997) C1-331-C1-332
Magnetic and Structural Characterisation of PbFe12-xCrxO19 (1.0 ≤ x ≤ 6.0) Hexaferrites Powders Obtained by Coprecipitation MethodS. Diaz1, J.L. Sanchez1, F. Leccabue2, B.E. Watts2, G. Bocelli3 and G. Albanese4
1 Facultad de Fisica/IMRE, Universidad de La Habana, La Habana 10400, Cuba
2 Istituto MASPEC/CNR, Via Chiavari 18/a, 43100 Parma, Italy
3 CSSD/CNR, V. le delle Scienze, 43100 Parma, Italy
4 Dipartimento di Fisica, Università di Parma, v. le delle Scienze, 43100 Parma, Italy
The present work describes the preparation of chromium substituted magnetoplumbite ferrites from nitrate salts, and the effect of Cr on its structural and magnetic properties. Powders with nominal composition PbFe12-xCrxO19 (1.0 ≤ x ≤ 6.0) were obtained by thermal decomposition at 920 °C of coprecipitated hydroxide-carbonate mixed salts. A complete substitution of Fe3+ by Cr3+ was found and the influence of Cr on cell parameters, ordering temperatures and hysteretic properties are reported. The results are discussed and compared in connection with behaviour observed in isostructural Ba- and Sr-compounds.
© EDP Sciences 1997