Diffusion of oxygen in YBa2Cu3O7−y

Abstract
The oxygen lattice diffusion in YBa2Cu3O7−y was studied with 18O as a tracer. For the composition of y=0.07, the oxygen lattice diffusion coefficient is represented by Dl,O =2.87×101 exp[−173(kJ/mol)/RT] cm2/s in the temperature range 250–400 °C. The oxygen lattice diffusion coefficient decreases with the increasing value of y.