Coexistence of antiferromagnetic order and superconductivity with TN higher than Tc in DyNi2B2C

M. S. Lin, J. H. Shieh, Y. B. You, Y. Y. Hsu, J. W. Chen, S. H. Lin, Y. D. Yao, Y. Y. Chen, J. C. Ho, H. C. Ku*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

32 引文 斯高帕斯(Scopus)

摘要

A superconducting transition temperature Tc of 3.8 K with an onset as high as 5.2-5.5 K was reported for quaternary borocarbide DyNi2B2C with a high antiferromagnetic Néel temperature TN around 10.1-10.8 K. No reentrant behavior was observed down to 0.3 K demonstrating a perfect coexistence between superconductivity and antiferromagnetic order. A superconducting upper critical field Hc2(0) of 3.0 kG, lower critical field Hc1(0) of 200 G and Ginzburg-Landau parameter κ of 3.7 were derived. A broad Tc transition points to a possible small Tc varying homogeneity range of DyNi2 - αB2 - βC1 - δ in the phase diagram. The magnetic entropy Sm of 10.3 J/mol K or 90% Rln 4 indicates antiferromagnetic ordering of Dy3+ with a quadruplet ground state in the tetragonal crystal field. Two field-induced weak-ferromagnetic-like transitions with a field of around 1 T were observed at 2 K.

原文英語
頁(從 - 到)403-408
頁數6
期刊Physica C: Superconductivity and its applications
249
發行號3-4
DOIs
出版狀態已發佈 - 1995 七月 15

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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