Novel Synthesis and High Pressure Behavior of Na0.3CoO2 x 1.3 H2O and Related Phases
Sangmoon Park, Yongjae Lee, Arnie Moodenbaugh, Thomas Vogt
TL;DR
This study introduces a new synthesis method for Na0.3CoO2 x 1.3 H2O, investigates its high-pressure behavior, and reports superconductivity at 4-5K, with detailed structural and compressibility analyses.
Contribution
It presents a novel synthesis route for Na0.3CoO2 x 1.3 H2O and explores its high-pressure structural properties and superconductivity for the first time.
Findings
Superconductivity observed at 4-5K in Na0.3CoO2 x 1.3H2O.
Determined bulk compressibilities of related phases.
Chemical changes under pressure vary with media.
Abstract
We have prepared powder samples of NaxCoO2 x yH2O using a new synthesis route. Superconductivity was observed in Na0.3CoO2 x 1.3H2O between 4 and 5K as indicated by the magnetic susceptibility. The bulk compressibilities of Na0.3CoO2 x 1.3H2O, Na0.3CoO2 x 0.6H2O and Na0.3CoO2 were determined using a diamond anvil cell and synchrotron powder diffraction. Chemical changes occurring under pressure when using different pressure transmitting media are discussed and further transport measurements are advocated.
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