Recent progress on compositional nanostripes of REBa2Cu 3O7-δ (RE ≤ Sm,Eu,Gd) superconductors

A. Hu, M. R. Koblischka, X. Yao, H. Zhou, M. Winter, U. Hartmann, M. Murakami

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Abstract

We characterized ordered compositional fluctuation in high-quality SmBa2Cu3O7-δ, (Sm0.5Eu 0.5)Ba2Cu3O7-δ, and (Sm 0.33Eu0.33Gd0.33)Ba2Cu 3O7-δ superconductors by atomic force microscopy, scanning tunnelling microscopy, and transmission electron microscopy. The presence of nanostripes along the crystalline c direction was confirmed in SmBa2Cu3O7-δ single crystals and in melt-processed (Sm0.5Eu0.5)Ba2Cu 3O7-δ, (Sm0.33Eu0.33Gd 0.33)Ba2Cu3O7-δ materials. Meanwhile, thickness fringes originating from the twin boundaries were also identified in some samples; these could be clearly separated from real nanostripes with sample tilting. Compositional nanostripes displayed spatial variation in both shape and wavelength over a large area of RE-Ba-Cu-O single domains. The origin of the nanostripe is discussed in the context of the competitive growth mechanism of RE1+xBa2-xCu 3O7-δ solid solution.

Original languageEnglish
Pages (from-to)S580-S584
JournalSuperconductor Science and Technology
Volume19
Issue number7
DOIs
Publication statusPublished - 2006 Jul 1

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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