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

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Abstract

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.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume249
Issue number3-4
DOIs
Publication statusPublished - 1995 Jul 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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    Lin, M. S., Shieh, J. H., You, Y. B., Hsu, Y. Y., Chen, J. W., Lin, S. H., Yao, Y. D., Chen, Y. Y., Ho, J. C., & Ku, H. C. (1995). Coexistence of antiferromagnetic order and superconductivity with TN higher than Tc in DyNi2B2C. Physica C: Superconductivity and its applications, 249(3-4), 403-408. https://doi.org/10.1016/0921-4534(95)00319-3