[Zurück]

R. Grössinger, J.C. Tellez Blanco, G. Wiesinger, M. Küpferling, F. Kools, A. Morel, P. Tenaud, M. Rossignol, J.M. Le Breton:
"The effect of substitution in M-type ferrites";
in: "Proc.17th int.Workshop on Rare Earth Magnets", Rinton Press, Newark, Delaware, USA, 2002, S. 74 - 85.

Proc. of 17th Internat. Workshop on Rare Earth Magnets and their Applications
August 18-22, 2002, Newark, Delaware, USA
Edited by G.C.Hadjipanayis and M.J.Bonder, Rinton Press; page: 74-85

THE EFFECT OF SUBSTITUTION IN M-TYPE FERRITES

R. Grössinger(1), J.C. Tellez Blanco(1), G.Wiesinger(1), M. Küpferling(1), F. Kools(2), A. Morel(2), P.Tenaud(3), M.
Rossignol(4), J.M. Le Breton(5)
(1) Inst. f. Festkörperphysik, Techn. University, Vienna, Austria
(2) FERROXDURE ? CARBONE LORRAINE, Evreux, France
(3)UGIMAG ? CARBONE LORRAINE, Saint-Pierre d?Allevard, France
(4)CNRS ? Lab. Louis Néel and Lab. Crystallography, Grenoble, France
(5) Groupe de Physique des Matériaux, UMR CNRS 6634 Univ. Rouen, France

A survey of the magnetic data of substituted M-type ferrites of the composition Ba1-xLaxFe12-xCoxO19 and Sr1-xLaxFe12-xCoxO19 is given. The anisotropy and the coercivity increases with Co content (up to x = 0.25). At low temperatures some anomaly in the SPD signal was found which is not due to a spin reorientation. The coercivity can be explained applying a modified nucleation type model.