Coupling strengths and flux pinning in oxide superconductors

Lichti, R. L.; Chan, K. C. B.; Cooke, D. W.; Boekema, C.
June 1989
Applied Physics Letters;6/5/1989, Vol. 54 Issue 23, p2361
Academic Journal
Muon spin relaxation measurements have been performed to obtain penetration depth versus temperature for several high-temperature oxide superconductors. Comparison with theoretical results based on the Eliashberg equations indicates that at 1 kOe the (RE)Ba2Cu3O7 materials (data for RE=Gd, Er, and Eu) are in the very strong coupling, extremely dirty limit, while data at 5 kOe for Bi2CaSr2Cu2O8 and Tl2Ca2Ba2Cu3O10 follow the strong coupling, clean limit curve.


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