Nanoscopic netted structure of compositional modulation in (Sm0.33 Eu0.33 Gd0.33) Ba2 Cu3 O7-δ superconductors

A. Hu, I. Hirabayashi, M. Winter, M. R. Koblischka, U. Hartmann, H. Zhou

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We report a nanoscaled crisscross network in high-quality melt-processed (Sm0.33 Eu0.33 Gd0.33) Ba2 Cu3 O7-δ superconductors investigated with atomic force microscopy (AFM) and transmission electron microscopy. In the ten-micrometer scale, such a net was unveiled as a consequence of crossing annular stripes originating from ordering compositional modulation. The AFM topographic images further displayed that this compositional stripe result in a surface modulation with a few-nanometer wavelength and roughness. The forming mechanism of this compositional stripe and its role as strong δ Tc -type pinning defects were discussed in the context of rare earth Ba oscillation around the stoichiometric ratio and the spatial fluctuation of local Tc values.

Original languageEnglish
Article number092505
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 2005 Feb 28


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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