Influence of the rare earth element substitution on oxygen adsorption-desorption properties of YBCO

Abstract

The oxygen adsorption-desorption properties of RBa₂Cu₃O_7-δ R = Gd, Er, Eu, Dy, Sm, Ho and Nd?nd Y_1-χLa_χBa₂Cu₃O_7-δ (χ = 0.1, 0.5 and 1.0) were investigated from room temperature to 950 oC by thermogravimetry (TG). The results show that all samples will release oxygen with the increasing of temperature and the released oxygen can be absorbed back into the sample when temperature decreases. However, dependent on the rare earth element, the amount of the released oxygen is different for these samples. Moreover, in the temperature increasing and decreasing circle the repetition of oxygen adsorption-desorption is also different.