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The effect of laser annealing on the superconducting critical temperature [T c] in Nb films prepared by the ion-beam sputtering method has been investigated. Ion beam sputtered Nb films at a substrate temperature of 50°C indicated a large increase in lattice parameter and acorresponding decrease in T c. After annealing by pulsed laser irradiations, the film showed recovery in both lattice parameter and T c. The relation between lattice parameter and T c of the laser annealed films is generally similar to that of the as-deposited films.
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Takei et al. (1980) studied this question.
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