湿度雰囲気下における超伝導酸化物Ba₂EuCu₃O_7-xの崩壊過程

抄録

The distribution for the respective constituent elements according to depth was examined in the disintegration of a superconducting oxide Ba₂EuCu₃O_7-x in different humidities at 25°C. Two kinds of segregation in the respective elements were observed during the disintegration: one was a small periodical segregation with about 10% variation of Ba content and the other was a large random one with about 30-50% variation. The time at which the small segregation appeared was closely correlated to the disintegration of the superconducting oxide. The concentrational variations of Ba and Eu elements in the large segregation were in an opposite manner.