A systematic Micro-Raman spectroscopic investigation has been performed on YBa2Cu3-xCoxO6+y ceramic samples of different Co content x in the interval 0≤x≤1 which are prepared by a polymerized complex method. With increasing Co content an evolution of the defect induced Raman scattering of the CuO chain modes (550-650 cm-1 region) has been observed. The intensity of the defect modes has increased with increasing Co concentration, which has in turn suggested increased disordering of oxygen in the based (Cu/Co)-Oy plane. It has been infered from Raman spectroscopic results that the CuO chain disorder is closely related to Tc and a certain minimal size of the oxygen disordered (or ordered) domain is needed for a decrease in Tc (or the appearance of superconductivity).
|ジャーナル||journal of the japan society of powder and powder metallurgy|
|出版ステータス||Published - 1995|
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