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Related Experiment Videos

Defect structure of superconducting YBa2Cu3O7-delta.

G Van Tendeloo1, S Amelinckx

  • 1Universiteit Antwerpen, R.U.C.A., Antwerp, Belgium.

Journal of Electron Microscopy Technique
|March 1, 1988
PubMed
Summary
This summary is machine-generated.

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Electron microscopy revealed defects in the Y1Ba2Cu3O7-delta superconductor. Defects like twinning and vacancy ordering impact its superconducting properties and stability, especially in powder form.

Area of Science:

  • Materials Science
  • Solid-State Physics
  • Superconductivity

Background:

  • Y1Ba2Cu3O7-delta is a prominent high-temperature superconductor.
  • Understanding defects is crucial for optimizing superconducting properties.

Purpose of the Study:

  • Investigate defects in Y1Ba2Cu3O7-delta using electron microscopy.
  • Characterize the impact of defects on material stability and structure.

Main Methods:

  • Electron microscopy was employed for high-resolution imaging.
  • Analysis focused on crystallographic defects, including twins and vacancies.

Main Results:

  • Twinning on (110) planes is linked to orthorhombicity, with twin bands ~50 nm wide.
  • A reversible orthorhombic-tetragonal transition occurs, controlled by diffusion.

Related Experiment Videos

  • Vacancy ordering forms a 2a0 x b0 superstructure in reduced material.
  • Powdered Y1Ba2Cu3O7-delta is unstable in air, showing (001) planar defects.

    • Conclusions:

    • Defect structures significantly influence Y1Ba2Cu3O7-delta properties.
    • Material stability is compromised in powdered form due to specific defects.