The high-field (critical field 39.5 T at 4.2 K) single-step metamagnet
ic transition was observed in the b axis of single crystal of TbCu2 an
d its temperature evolution was studied. The transition is described b
y a single-ion Hamiltonian taking into account higher order crystal-fi
eld terms significantly contributing to the magnetocrystalline anisotr
opy. (C) 1998 Elsevier Science B.V. All rights reserved.