Abstract
Positron lifetime and Doppler broadening of the annihilation line measurements were performed in highT c superconducting samples YBa2Cu3Cd x O y ,x=0, 0.05 and 6.9<y<7, as a function of temperature in the region of 14–300 K. It was found that the positron lifetime and theS parameter values are lower in the Cd doped sample than those in the undoped one. It was also observed that the positron annihilation parameters show similar temperature dependence for the undoped and Cd doped samples. We conclude that the Cd doping in highT c superconductor YBa2Cu3Cd x O y , 6.9<y<7 fills defects associated with oxygen vacancies probably in oxygen deficient regions which can trap positrons.
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Lagouri, T., Dedoussis, S., Chardalas, M. et al. Positron annihilation studies in highT c superconductor YBa2Cu3Cd x O y (x=0, 0.05). Journal of Radioanalytical and Nuclear Chemistry, Articles 211, 181–185 (1996). https://doi.org/10.1007/BF02036271
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DOI: https://doi.org/10.1007/BF02036271