An anomalously huge resistivity peak under pressure in CeRhGe

We have measured the electrical resistivity under pressure up to 2 GPa for an antiferromagnet, CeRhGe. The resistivity at ambient pressure decreases monotonically below a Néel temperature T_N = 10 K. With increasing pressure P, the resistivity has a peak around 10 K, which is anomalously enhanced up to 1.2 GPa. With further increasing pressure, the resistivity peak is diminished; the Néel temperature becomes zero at a critical pressure P_c = 1.9 GPa. The A-value of the resistivity ρ in the Fermi liquid relation ρ = ρ₀ + AT² is also found to increase with increasing pressure and has a maximum at P_c which corresponds to the value for the heavy-fermion superconductor CeCu ₂Si₂.