The crystal structure of superconducting LuNi2B2C and the related phase LuNiBC

T. Siegrist, H. W. Zandbergen, R. J. Cava, J. J. Krajewski, W. F. Peck

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Abstract

SUPERCONDUCTING intermetallic compounds with relatively high transition temperature (T have been found in the systems Ln-Tr-B-C, where Ln is a lanthanide element (Y, Ho-Lu) and Tr a transition metal (Pd or Ni) 1,2. In the nickel-bearing system, the superconducting phase has the formula LnNi (ref. 2). Although many structures are known for ternary carbides and borides, only a few have been reported for quaternary boro-carbides 3. Here we describe two new phases that form in the Lu-Ni-B-C system: LuNi, a superconductor with a Tof 16.6 K (ref. 2), and LuNiBC, a closely related non-superconducting phase. The superconductor is a variant on the layered ThCritype structure4, with additional carbon in the Lu plane. LuNiBC is derived from LuNi by adding another layer of Lu-C, producing a NaCl-type intergrowth. A new homologous series of inter-metallic phases may be derivable from the simple building principles of these two structures.

Original languageEnglish (US)
Pages (from-to)254-256
Number of pages3
JournalNature
Volume367
Issue number6460
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

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    Siegrist, T., Zandbergen, H. W., Cava, R. J., Krajewski, J. J., & Peck, W. F. (1994). The crystal structure of superconducting LuNi2B2C and the related phase LuNiBC. Nature, 367(6460), 254-256. https://doi.org/10.1038/367254a0