The magnetic-phase diagram of the free-powder anisotropic Neel ferrimagnet
is presented in terms of the reduced sublattice anisotropy fields, x and y.
It marks the boundaries of the regions of field-induced first-order transi
tions involving the collinear and the non-collinear states. The transition
from the ferrimagnetic to the canted phase is always second order. (C) 1999
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