AC susceptibility measurements under high pressure up to 2.0 GPa

A newly developed pressure setup for a.c. susceptibility measurements in th e pressure range up to 2.0 GPa is presented; the temperature domain extends from 77 to 450 K. The steel pressure chamber contains the sample located a t the center of a set of three compensated pick-up coils and the pressure a nd temperature sensors. Either alcohol or extraction naphtha is used as the liquid pressure transmitting medium. The (P, T) magnetic phase diagram of (Fe0.975Ni0.025)(2)P system in the pressure range up to 2.0 GPa is reported .