Boron substitution in ternary metal phosphide superconductors

R. E. Schaak, R. J. Cava

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Partial substitution of boron for phosphorus in the ternary phosphide superconductors ZrRuP and LaRu2P2 induces highly anisotropic structural changes and suppresses the superconducting transition temperatures. Undoped ZrRuP [hexagonal, a=6.445(4)Å, c=3.765(2)Å] systematically expands for ZrRuP1-xBx (x=0.05, 0.10, 0.15, 0.20, 0.40) in the a direction to 6.949(4)Å and shrinks in the c direction to 3.601(3)Å. Superconductivity is still present in the boron-substituted samples, although Tc drops from 10.1K in ZrRuP to 5.6K in ZrRuP0.6B0.4. LaRu2P2 [tetragonal, a=4.032(2)Å, c=10.632(7)Å] remains essentially unchanged along the a axis [a=4.037(1)Å] upon substitution at a starting composition of LaRu2P1.6B0.4, but shrinks along the c axis to 10.477(5)Å. Accordingly, the superconducting Tc drops from 4.0K for LaRu2P2 to 2.0K for LaRu 2P1.6B0.4.

Original languageEnglish (US)
Pages (from-to)1231-1235
Number of pages5
JournalMaterials Research Bulletin
Volume39
Issue number9
DOIs
StatePublished - Jul 2 2004

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • A. Intermetallic compounds
  • A. Superconductors
  • B. Chemical synthesis
  • C. X-ray diffraction
  • D. Magnetic properties

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