Discovery of Li2(Pd,Pt)3B superconductors

P. Badica, K. Togano, H. Takeya, K. Hirata, S. Awaji, K. Watanabe

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Critical temperature Tc of the Li2(Pd1-xPtx)3B was reported to be 7-8 K for x = 0 and 2.2-2.8 K for x = 1. In this article we present our preliminary results on behavior of magnetization-temperature curves with starting composition of Pd-B precursor, y-Li concentration in LiyPd3B and post-annealing of the Pd-end compound. Results suggest that to maximize Tc ratio Pd:B should be close to 3:1, while y-Li has to be optimum. The lowest Tc for LiyPd3B was 4.4-4.6 K, while post-annealings at 560 °C allowed enhancement of Tc up to 8.2-8.4 K. Compositions Li2Z3B with Z = Ni, Ru, Rh, Re, Ag are not superconducting down to 1.8 K. Exception is composition with Re showing superconductivity due to Re3B compound. All samples were prepared by arc melting.

Original languageEnglish
Pages (from-to)91-94
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 Sep 1

Keywords

  • Critical temperature
  • Li(Pd,Pt)B
  • Magnetization
  • Post-annealing
  • Stoichiometry
  • Superconductor

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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