Low-Temperature Properties of CePt_3P Tuned by Magnetic Field

作     者：陈健 吕柏江 郑实益 李玉科 Jian Chen;Bai-Jiang Lv;Shi-Yi Zheng;Yu-Ke Li

作者机构：Zhejiang University of Water Resources and Electric Power Zhejiang Provincial Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang University Department of Physics Hangzhou Normal University 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2019年第36卷第5期

页      面：98-101页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

基　　金：Supported by the Zhejiang Provincial Natural Science Foundation of China under Grant No LQ19A040006 the Scientific Research Fund of Zhejiang Provincial Education Department under Grant No Y201840160 

主　　题：Low-Temperature Properties of CePt3P Tuned by Magnetic Field AFM MMT QCP 

摘      要：We present low-temperature magnetization, magnetoresistance and specific heat measurements on the Kondo lattice compound CePt_3P under applied magnetic fields up to 9.0 T. At zero field, CePt_3P exhibits a moderately enhanced Sommerfeld coefficient of electronic specific heat γCe=86 mJ/mol·K^2 as well as two successive magnetic transitions of Ce 4f moments: an antiferromagnetic ordering at T_(N_1) = 3.0 K and a spin reorientation at T_(N_2)=1.9 K. The value of T_(N_1) shifts to lower temperature as magnetic field increases, and it is ultimately suppressed around B_c ～3.0 T at 1.5 K. No evidence of non-Fermi liquid behavior is observed around B_c 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∝T^n with the exponent n decreasing monotonously from ～2.6 around B_c down to ～1.7 for B = 9.0 T. The T-B phase diagram constructed from the present experimental results of CePt_3P does not match the quantum criticality scenario of heavy fermion systems.