Single-crystal growth and characterization of REBa2Cu4O8 and Y1-xCaxBa2Cu4O8

C. A. Hijar, C. L. Stern, Kenneth R Poeppelmeier, K. Rogacki, Z. Chen, B. Dabrowski

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12 Citations (Scopus)

Abstract

Crystals of REBa2Cu4O8 (RE = Yb, Tm, Er, Ho, Dy, and Y1-xCax) were grown at 1100°C and 600 bar of O2 pressure in a hot isostatic press furnace. Single crystal X-ray diffraction data show that all compounds crystallized in space group Ammm (#65) with the approximate lattice parameters a ≈ 3.82 A ̊, b ≈ 3.86 A ̊, c ≈ 27.1 A ̊, and Z = 2 As the ionic radius of the lanthanide decreased, the lattice parameters decreased. Substitution of calcium in Y1-xCaxBa2Cu4O8 crystals (x ∼ 0.02) increased Tc to 87 K.

Original languageEnglish
Pages (from-to)13-21
Number of pages9
JournalPhysica C: Superconductivity and its Applications
Volume252
Issue number1-2
DOIs
Publication statusPublished - Oct 1 1995

ASJC Scopus subject areas

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

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