90 citations · 268 across the 12 of their papers we have counts for
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Electronic phase diagram of the layered cobalt oxide system, LixCoO2 (0.0 <= x <= 1.0)
T. Motohashi, T. Ono, Y. Sugimoto +5
Here we report the magnetic properties of the layered cobalt oxide system, LixCoO2, in the whole range of Li composition, 0 <= x <= 1. Based on dc-magnetic susceptibility data, com…
Electrochemical synthesis and properties of CoO2, the x = 0 phase of the AxCoO2 systems (A = Li, Na)
T. Motohashi, T. Ono, Y. Katsumata +3
Single-phase bulk samples of the "exotic" CoO2, the x = 0 phase of the AxCoO2 systems (A = Li, Na), were successfully synthesized through electrochemical de-intercalation of Li fro…
Synthesis and properties of CoO2, the x = 0 end member of the LixCoO2 and NaxCoO2 systems
T. Motohashi, Y. Katsumata, T. Ono +3
We report here the synthesis of single-phase bulk samples of CoO2, the x = 0 end member of the AxCoO2 systems (A = Li, Na), from a pristine LiCoO2 sample using an electrochemical t…
Kinetics and thermodynamics of the degree of order of the B cations in double-perovskite Sr2FeMoO6
T. Shimada, J. Nakamura, T. Motohashi +2
Here we show that the B-site cation (Fe/Mo) ordering in the double-perovskite magnetoresistor, Sr2FeMoO6, is controlled by either kinetics or thermal equilibrium depending on the t…
The valence state of iron in the Sr2Fe(Mo,W,Ta)O6.0 double-perovskite system: An Fe K-edge and L2,3-edge XANES study
M. Karppinen, H. Yamauchi, Y. Yasukawa +4
Here we employ both Fe K and L2,3 edge x-ray absorption near-edge structure (XANES) spectroscopy techniques to clarify that iron in the B-site ordered double-perovskite halfmetal,…
Sodium and oxygen nonstoichiometry and thermoelectric properties of NaxCoO2+d
T. Motohashi, M. Karppinen, H. Yamauchi
The sodium-cobalt oxide NaxCoO2+d is a promising candidate for thermoelectric applications since it may possess simultaneously large thermoelectric power and low resistivity. It is…