Magnetic and Structural Properties of CeTl at Hydrostatic Pressure

Abstract

The electrical resistivity, ac magnetic susceptibility and magnetization of CeTl were measured at pressures up to 17 kbar. At ambient pressure the cubic to tetragonal transition occurs at T_M=193 K and antiferromagnetic state with a metamagnetic character below the Néel temperature T_N=25.5 K. When pressure p increases, T_M increases at a rate of dT_M⁄dp=+19 K/kbar, T_N decreases at a rate of dT_N⁄dp=−0.28 K/kbar and metamagnetic transition field H_c at 4.2 K decreases from 20 kOe at ambient pressure. Above about 10 kbar, pressure-induced ferromagnetic phase appears and its Curie temperature T_c increases at a rate of dT_c⁄dp=+0.10 K/kbar.