Superconducting and calorimetric properties of the metastable palladium borocarbide ThPd2B2C

P. J. Jiang, Y. Y. Hsu, Y. B. You, H. G. Ku, J. G. Ho, S. H. Lin, Y. D. Yao, Y. Y. Chen

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Abstract

A broad superconducting transition with bulk Tc of 14 K and a diamagnetic onset as high as 20 K was observed for the metastable, as-melted ThPd2B2C sample from magnetic studies. Low temperature specific heat data yield a bulk Tc of 14 K, an electronic-term coefficient 7 of 12 mJ/mol K2 and a Debye temperature θD of 320 K. The systematic variation of Tc for the nonmagnetic quaternary borocarbides RT2B2C (R = Sc, Y, Lu, La, Th; T = Ni, Pd, Pt) is correlated with the electronic-term coefficient γ and the transition metal T-T nearest-neighbor in-plane distance. The variation of the transitional metal 3d/4d/5d-dominated conduction band and thus the Fermi-level density of states N(EF) is believed to be the determining factors for Tc variation of these borocarbides.

Original languageEnglish
Pages (from-to)646-649
Number of pages4
JournalChinese Journal of Physics
Volume34
Issue number2 II
Publication statusPublished - 1996 Dec 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Jiang, P. J., Hsu, Y. Y., You, Y. B., Ku, H. G., Ho, J. G., Lin, S. H., Yao, Y. D., & Chen, Y. Y. (1996). Superconducting and calorimetric properties of the metastable palladium borocarbide ThPd2B2C. Chinese Journal of Physics, 34(2 II), 646-649.