The designing of novel materials is a fascinating and innovative pathway in materials
science. Particularly, novel layered compounds have tremendous influence in various …

Na x CoO 2, the parent compound of the recently synthesized superconductor Na x CoO 2∶
y H 2 O, exhibits bulk antiferromagnetic order below∼ 20 K for 0.75≤ x≤ 0.9. We have …

Unconventional superconductivity in bulk materials under ambient pressure is extremely
rare among the 3d transition metal compounds outside the layered cuprates and iron-based …

Superconductors is neither about basic aspects of superconductivity nor about its
applications, but its mainstay is superconducting materials. Unusual and unconventional …

Na x CoO2· y H2O must be hydrated to superconduct, and its triangular CoO2 layers provide
an intriguing contrast with the square CuO2 layers of the high-temperature superconductors …

Single crystals of various congruently and incongruently melting oxides have been recently
grown by the floating zone (FZ) and traveling solvent floating zone (TSFZ) techniques. For …

We report on the preparation and characterization of single-crystal γ phase Na x CoO 2 with
0.25≤ x≤ 0.84 using a nonaqueous electrochemical chronoamperemetry technique. By …

Na x (H 3 O) z CoO 2· y H 2 O has a highly two-dimensional triangular lattice of Co ions and
exhibits the superconducting transition at TC= 4.7 K. It is classified as an extreme type-II …

In this study, the self-diffusion coefficient of Na+ (D NaJ) in P2-Na x CoO2 was measured
during charge and discharge reactions between P2-Na x CoO2 and Na metal electrodes in …

We report a Co 59 Knight-shift measurement in a single crystal of the cobalt oxide
superconductor Na x Co O 2∙ 1.3 H 2 O (T c= 4.25 K). We find that the shift due to the spin …