1989 年 97 巻 1122 号 p. 200-202
The temperature dependence of electrical resistance of Eu1+xBa2-xCu3Oy (x=0.0, 0.2, and 0.5) was measured in N2O and 5% N2O-N2. Kinks were observed in the temperature-resistance curves of EuBa2Cu3Oy in N2O and 5% N2O-N2. This behavior was considered to be related to the order-disorder transition of oxygen vacancy (oxygen ion). Substitution of Eu ions for Ba ions affects the decomposition of N2O and the migration of oxygen ions, that is, the local rearrangement of oxygen ions in Eu1+xBa2-xCu3Oy.