The distribution of anisotropy fields in Ba ferrite particles and its evolu
tion with the addition of Co/Ti ions is studied. The width of the anisotrop
y distribution increases with increase in doping content, and further is la
rger at low temperature. The result is ascribed to the role of the shape an
isotropy, the effect of which is enhanced by doping and decreasing temperat
ure. (C) 1999 Elsevier Science B.V. All rights reserved.