Magnetisation measurements have been performed on spherical single cry
stals of dysprosium iron garnet (Dy3Fe5O12) in high de magnetic fields
up to 16 T applied along the three principal crystallographic directi
ons [111], [110] and [100]. The magnetic phase transitions near the in
version (or compensation) temperature T-I between the collinear and th
e field induced canted magnetic structures are observed and the differ
ent associated magnetic phase diagrams precisely determined in the (H,
T) plane. The mean exchange field acting on the Dy ions and the effect
ive anisotropy field are deduced to be (12.9+/-0.2)T and (1.2+/-0.1) T
respectively. Above 228.2+/-0.5 K, only the collinear magnetic phase
exists for all the directions. These results are compared to previous
high pulsed magnetic fields data. (C) 1998 Elsevier Science S.A.