Synthesis of three layer Na xCoO 2 (x=0.3, 0.5, 0.6, 0.75, 1.0) and superconductivity in three layer Na 0.3CoO 2•1.3H 2O

M. L. Foo, T. Klimczuk, L. Li, N. P. Ong, R. J. Cava, Q. Huang, J. W. Lynn, H. W. Zandbergen

Research output: Contribution to journalConference article

Abstract

The synthesis of three layer sodium cobalt oxide, Na xCoO 2 (x=0.3, 0.5, 0.6, 0.75 and 1.0) is reported. For x=0.6, 0.75, and 1.0, conventional solid-state synthesis was employed. x=0.3 and 0.5 were obtained via oxidative deintercalation of sodium at room temperature. x=0.3 can be hydrated to Na 0.3CoO 2•1.3H 2O which is superconducting with a T c of 4.3 K. Although having the same chemical stiochiometry as the previously reported two layer superconductor, it has a different stacking sequence of CoO 2 layers making it structurally distinct. Crystals of three layer NaCoO 2 show triangular morphology compared to hexagonal morphology for two layer Na 0.7CoO 2.

Original languageEnglish (US)
Article numberFF6.11
Pages (from-to)275-280
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume848
StatePublished - 2005
Event2004 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 29 2004Dec 2 2004

All Science Journal Classification (ASJC) codes

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

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