Evolution of the physical properties with Na content in the cobalt oxide superconductors Nax CoO2 · 1.3 H2 O

K. Matano, G. q. Zheng, J. Cmaidalka, Y. Sun, R. L. Meng, C. W. Chu

Research output: Contribution to journalArticle

Abstract

We report measurements on the cobalt oxide superconductors Nax CoO2 · 1.3 H2 O over a wide Na content range x = 0.25 - 0.34, using X-ray diffraction, susceptibility and 59Co nuclear quadrupole resonance (NQR) techniques. We find that Tc increases with decreasing x but reaches to a plateau for x {less-than or slanted equal to} 0.28, which correlates closely with the NQR frequency that measures the occupancy of the Co 3d-orbitals.

Original languageEnglish
Pages (from-to)871-872
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006

Keywords

  • NQR
  • Na CoO · H O
  • Superconductivity
  • Triangular lattice

ASJC Scopus subject areas

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

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