Observation of New Magnetic Phases in Ce ₂Fe ₁₇ under High Pressure and High Magnetic Fields

Magnetization and electrical resistivity measurements have been performed for Ce2Fe17 under high pressures of up to 1.2 GPa and high magnetic fields of up to 17T. At ambient pressure, two antiferromagnetic phases appear at T-N = 215 K and T-c = 125 K with decreasing temperature. A metamagnetic transition from the antiferromagnetic to the forced ferromagnetic state is observed at 4.2 K. The transition field increases with increasing pressure; whereas the saturation magnetization, saturation field and T-N decrease. New magnetic phases, which are different from the two antiferromagnetic and forced ferromagnetic phases, are observed under high pressure and high magnetic fields.