In-plane oxygen diffusion in single crystals of Bi2Sr2CaCu2O8+δ

We have determined the in-plane diffusion coefficient for nonstoichiometric oxygen in single crystals of Bi2Sr2CaCu2O8+δ (Bi-2212). This was done by measuring the superconducting diamagnetic transition of the crystals by AC susceptometry, following repeated annealing of the crystals at a range of te...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2008-01, Vol.468 (1), p.81-87
Main Authors: Benseman, T.M., Cooper, J.R., Balakrishnan, G.
Format: Article
Language:English
Subjects:
66.30.Hs
66.30.−h
74.62.Bf
74.72.Hs
81.65.Mq
Bi-2212
Bi-based cuprates
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cuprates superconductors (high tc and insulating parent compounds)
Diffusion
Exact sciences and technology
Oxygen
Physics
Superconductivity
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Summary:We have determined the in-plane diffusion coefficient for nonstoichiometric oxygen in single crystals of Bi2Sr2CaCu2O8+δ (Bi-2212). This was done by measuring the superconducting diamagnetic transition of the crystals by AC susceptometry, following repeated annealing of the crystals at a range of temperatures. We find that the chemical diffusion coefficient for oxygen in Bi-2212 is well described by Dab*=1.5-0.7+1.4×10-3exp-(1.23±0.06)eV/kBTm2/s.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.10.018