Low-Temperature Properties of CePt3P Tuned by Magnetic Field

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 91-94
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/36/5/057501

摘要

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 =3.0 K 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 ～ 3.0 T 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 p ∝ 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 CePta P does not match the quantum criticality scenario of heavy fermion systems.