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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 =2.87×10−1 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.
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Ikuma et al. (1988) studied this question.
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