47 citations · 97 across the 15 of their papers we have counts for
15 papers
Structural properties and cation ordering in layered hexagonal CaxCoO2
H. X. Yang, Y. G. Shi, X. Liu +3
A series of CaxCoO2 (0.15 <= x <= 0.40) materials have been prepared by means of ion exchange reaction from NaxCoO2. Transmission electron microscopy (TEM) measurements revealed a…
Effect of Ti doping on the electrical transport and magnetic properties of layered compound Na0.8CoO2
W. Y. Zhang, Y. G. Zhao, Z. P. Guo +9
Effect of Ti doping on the electrical transport and magnetic properties of layered Na0.8Co1-xTixO2 compounds has been investigated. The lattice parameters a and c increase with x.…
Effects of Mn and Ti doping on superconductivity and charge ordering in NaxCoO2 system
Y. G. Shi, H. X. Yang, X. Liu +4
The superconductivity in Na0.3Co1-xMxO2.1.3H2O and the charge ordering in Na0.5Co1-xMxO2 have been investigated for M = Mn and Ti substituting for Co. We have first successfully sy…
Electron energy loss spectra of Na0.33CoO2.yH2O (y = 0, 0.6 and 1.3)
J. Q. Li, H. X. Yang, R. J. Xiao +2
Electron energy loss (EEL) spectra have been obtained on materials with the nominal compositions of Na0.33CoO2_yH2O (y = 0, 0.6 and 1.3). Spectral analyses revealed systematic chan…
Structural Phase Transitions and Sodium Ordering in Na0.5CoO2: a Combined Electron Diffraction and Raman Spectroscopy Study
H. X. Yang, C. J. Nie, Y. G. Shi +6
The nonstoichiometric NaxCoO2 system exhibits extraordinary physical properties that correlate with temperature and Na concentration in its layered lattice without evident long-ran…
Phase separation, effects of magnetic field and high pressure on charge ordering in y-Na0.5CoO2
H. X. Yang, Y. G. Shi, C. J. Nie +7
Transmission electron microscopy observations reveal the presence of complex superstructures and remarkable phase separation in association with Na-ordering phenomenon in y-Na0.5Co…