Magnetic anisotropy in the pressure-induced phase of the orthorhombic PrCu2

Abstract In order to characterize the magnetic state at high pressure, anisotropic susceptibilities, χ a , χ b and χ c were measured up to 1.8 GPa in PrCu 2 , which seems to exhibit a pressure-induced Van Vleck paramagent-to-antiferromagnet transition at 1.2 GPa. It is speculated that the ordered 4f-moments lie in the b -plane in the pressure-induced magnetic state. Remarkable pressure-effects on susceptibility are observed in the b -plane, as indicated in the co-operative Jahn-Teller effect and in the metamagnetism under high field.