G. Turilli et G. Asti, MODEL FOR INITIAL SUSCEPTIBILITY AS A FUNCTION OF TEMPERATURE IN THE PRESENCE OF SPIN REORIENTATION TRANSITIONS, Journal of magnetism and magnetic materials, 158, 1996, pp. 371-372
The initial susceptibility of (Co,Zn)(2)-W hexagonal ferrite single cr
ystals was measured up to 500 degrees C in direction parallel and perp
endicular to the c-axis. Two spin reorientation transitions and a ther
mal hysteresis were observed. The analysis in terms of the domain wall
bulging model indicates the presence of a high density of pinning cen
tres inside the crystals.