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- W1989428848 abstract "Abstract Magnetization relaxation measurements have been performed on single crystals of YBa 2 CU 3 O 7−δ , La 1.85 Sr 0.15 CuO 4 and Bi 2 Sr 2 CaCu 2 O 8 . We have investigated samples of very different sizes, prepared by various methods. The form of the temperature dependence of the relaxation rate is strongly correlated to the nature of the defects within the crystals. After discussing the Anderson-Kim flux creep model, we consider our data in the framework of more recent models of magnetic flux relaxation. For YBa 2 Cu 3 O 7−δ and La 1.85 Sr 0.15 CuO 4 in fields parallel to the c -axis, the high values of the critical current density at 4K and its temperature dependence seem to be consistent with models of strong pinning by extended planar defects. Furthermore, for Bi 2 Sr 2 CaCu 2 O 8 in the same field configuration, the two-dimensional aspect has decisive consequences on the pinning which is better described by weak collective theories." @default.
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- W1989428848 date "1993-04-01" @default.
- W1989428848 modified "2023-09-26" @default.
- W1989428848 title "Influence of defects on relaxation in high-Tc superconductors" @default.
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- W1989428848 doi "https://doi.org/10.1016/0022-3697(93)90331-k" @default.
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