Abstract
We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt3P under applied magnetic fields up to 9.0 T. At zero field, CePt3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe = 86 mJ/mol·K2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at TN1 = 3.0K and a spin reorientation at TN2 = 1.9 K. The value of TN1 shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around Bc ∼ 3.0T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around Bc down to the lowest temperature measured. Moreover, γ decreases monotonously with increasing the magnetic field. On the other hand, the electrical resistivity shows an anomalous temperature dependence ρ ∝ Tn with the exponent n decreasing monotonously from ∼2.6 around Bc down to ∼1.7 for B = 9.0 T. The T–B phase diagram constructed from the present experimental results of CePt3P does not match the quantum criticality scenario of heavy fermion systems.
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