Effects of N₂O Gas on Electrical Properties of Eu_1+xBa_2-xCu₃O_y

Abstract

The temperature dependence of electrical resistance of Eu_1+xBa_2-xCu₃O_y (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 EuBa₂Cu₃O_y 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 Eu_1+xBa_2-xCu₃O_y.