J. Phys. IV France 07 (1997) C1-197-C1-198
Perminvar-Like Behaviour in some Hexagonal FerritesZ. Simsa1, R. Gerber2, V. Lewis2 and V.A.M. Brabers3
1 Institute of Physics ASCR, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
2 University of Salford, M5 4WT Salford, U.K.
3 University of Technology, 5600 Eindhoven, The Netherlands
A novel, perminvar-like behaviour of the magnetization curves in the hard direction of titanium containing bulk and thin film barium hexagonal ferrites was observed at low temperatures. The DC moments and AC susceptibilities in the 1-1000 Hz frequency range were measured by VSM and SQUID magnetometers in the easy and hard magnetic directions at temperatures from 5 to 300 K. The perminvar-like effects were explained on the basis of the reorientation of Fe2+ - Ti4+ pairs in octahedral 12k sites of the hexagonal lattice.
© EDP Sciences 1997