Pinning by oxygen vacancies in high-Tc superconductors
E. M. Chudnovsky
DOI 10.1103/PhysRevLett.65.3060 · Physical Review Letters
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Abstract
It is shown that recent data of Murray et al. on spatial correlations in flux lattices of Bi-Sr-Ca-Cu-O (BSCCO) may be explained if one assumes that 1% of oxygen atoms in CuO2 layers are missing. This estimate, being in remarkable agreement with that deduced by Kes and van der Beek from ac-susceptibility measurements, provides strong confidence that oxygen vacancies are the major source of pinning in BSCCO.
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