中国物理B ›› 2017, Vol. 26 ›› Issue (5): 57401-057401.doi: 10.1088/1674-1056/26/5/057401

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Superconductivity in self-flux-synthesized single crystalline R2Pt3Ge5(R = La, Ce, Pr)

Q Sheng(盛琪), J Zhang(张建), K Huang(黄百畅), Z Ding(丁兆峰), X Peng(彭小冉), C Tan(谭程), L Shu(殳蕾)   

  1. 1 State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
  • 收稿日期:2016-11-28 修回日期:2017-02-16 出版日期:2017-05-05 发布日期:2017-05-05
  • 通讯作者: L Shu E-mail:leishu@fudan.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11204041) and STCSM of China (Grant No. 15XD1500200).

Superconductivity in self-flux-synthesized single crystalline R2Pt3Ge5(R = La, Ce, Pr)

Q Sheng(盛琪)1, J Zhang(张建)1, K Huang(黄百畅)1, Z Ding(丁兆峰)1, X Peng(彭小冉)1, C Tan(谭程)1, L Shu(殳蕾)1,2   

  1. 1 State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
  • Received:2016-11-28 Revised:2017-02-16 Online:2017-05-05 Published:2017-05-05
  • Contact: L Shu E-mail:leishu@fudan.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11204041) and STCSM of China (Grant No. 15XD1500200).

摘要:

In order to study the basic superconductivity properties of Pr2Pt3Ge5, we synthesized the single crystalline samples by the Pt-Ge self-flux method. R2Pt3Ge5 (R = La, Ce) were also grown for a systematic study. Zero-resistivity was observed in both the La- and Pr-based samples below the reported superconducting transition temperatures. However, magnetic susceptibility measurements showed low superconductivity volume fractions in both La2Pt3Ge5 and Pr2Pt3Ge5 (less than 2%). Ce2Pt3Ge5 did not show any signature of superconductivity. From the specific heat measurements, we did not observe a superconducting transition peak in Pr2Pt3Ge5, suggesting that it is not a bulk superconductor. The magnetic susceptibility and heat capacity measurements revealed two antiferromagnetic (AFM) orders in Pr2Pt3Ge5 at TN1 = 4.2 K and TN2=3.5 K, as well as a single AFM transition at TN = 3.8 K in Ce2Pt3Ge5.

关键词: superconductivity, antiferromagnetism, heavy fermion behavior

Abstract:

In order to study the basic superconductivity properties of Pr2Pt3Ge5, we synthesized the single crystalline samples by the Pt-Ge self-flux method. R2Pt3Ge5 (R = La, Ce) were also grown for a systematic study. Zero-resistivity was observed in both the La- and Pr-based samples below the reported superconducting transition temperatures. However, magnetic susceptibility measurements showed low superconductivity volume fractions in both La2Pt3Ge5 and Pr2Pt3Ge5 (less than 2%). Ce2Pt3Ge5 did not show any signature of superconductivity. From the specific heat measurements, we did not observe a superconducting transition peak in Pr2Pt3Ge5, suggesting that it is not a bulk superconductor. The magnetic susceptibility and heat capacity measurements revealed two antiferromagnetic (AFM) orders in Pr2Pt3Ge5 at TN1 = 4.2 K and TN2=3.5 K, as well as a single AFM transition at TN = 3.8 K in Ce2Pt3Ge5.

Key words: superconductivity, antiferromagnetism, heavy fermion behavior

中图分类号:  (Magnetic properties including vortex structures and related phenomena)

  • 74.25.Ha
75.50.Ee (Antiferromagnetics)