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Crystal structure and thermoelectric properties of Ba$$_{x}$$CoO$$_{2}$$ synthesized by means of ion-exchange method

Igarashi, Dai*; Miyazaki, Yuzuru*; Yubuta, Kunio*; Igawa, Naoki ; Kajitani, Tsuyoshi*

The crystal structures of polycrystalline ${it A}$ $$_{x}$$CoO$$_{2}$$ (${it A}$=Ca, Sr, Ba) have been determined by the neutron powder diffraction and the electron diffraction studies. In the profile of the Ba$$_{0.35}$$CoO$$_{2}$$, the 002 peak was shifted to lower diffraction angle compared with those of other samples, and the diffraction peak attributed to the superlattice structure was appeared between 002 and 004 peaks. The relationship between the crystal structures and thermoelectrical properties will be discussed in the presentation.



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