Stabilization of superconducting LnPt2B2C by partial substitution of gold for platinum

R. J. Cava, B. Batlogg, J. J. Krajewski, W. F. Peck, T. Siegrist, R. M. Fleming, S. Carter, H. Takagi, R. J. Felder, R. B. van Dover, L. W. Rupp

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The quaternary intermetallic compounds LnPt2B2C (Ln=La, Pr and Y) were recently shown to be superconducting at temperatures up to 10.5 K. Annealing conditions were not found, however, which yielded single-phase material. Here it is reported that the partial substitution of Au for Pt in LnPt2B2C yields essentially single-phase polycrystalline material under annealing conditions readily accessible by conventional techniques. This is accomplished through arcmelting LnPt1.5Au0.6B2C, a composition slightly superstoichiometric in transition metal, and annealing at 1100°C in Ta foil: a small amount of melt phase formed in the anneal is wicked away from the sample leaving good-quality material behind.

Original languageEnglish (US)
Pages (from-to)170-174
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number1-2
StatePublished - Jun 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


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