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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…
Superstructure, sodium ordering and antiferromagnetism in NaxCoO2 (0.75<x<1.0)
Y. G. Shi, H. C. Yu, C. J. Nie +1
Transmission-electron-microscopy investigation reveals the presence of a superstructure with a doubled period of 2d110 in the NaxCoO2 materials for x ranging from 0.75 to 1.0. Syst…
Structure and physical properties of NaxCoO2.yH2O superconducting system
Y. G. Shi, J. Q. Li, H. C. Yu +3
The structural properties of NaxCoO2 and NaxCoO2yH2O have been investigated. The NaxCoO2yH2O samples in general show up the superconducting transitions at around 3.5K. EDAX analyse…
Raman scattering, X-ray photoemission spectra and superconductivity of a tiny Ag diffusion to MgCNi3
Fa-Min Liu, J. Q. Li, C. Dong +3
The tiny Ag diffusion to MgCNi3 has been prepared by solid states reaction. Its structure was characterized by X-ray diffractometer (XRD). The results show that a small mount of Ag…
X-ray photoemission study of polycrystalline Mg(1-x)Al(x)B(2)
Fa-Min Liu, C. Dong, J. Q. Li +1
Polycrystalline Mg(1-x)Al(x)B(2) (x = 0, 0.1, 0.4, 0.5, 0.6, 1) samples have been prepared by a conventional solid state reaction. The Mg 2p, Al 2p and B 1s core level binding ener…