Cathodoluminescence microscopy of high T
c superconducting YBCO and BSCCO materials

Cathodoluminescence (CL) and secondary electron emission (SEE) in the scanning electron microscope have been used to study the effects of mechanical polishing and electron irradiation on YBa2Cu3O7‐x ceramics. CL spectra from the mechanically polished superconductors show an enhanced 2.4 eV luminescence band, which is related to oxygen content redistribution or depletion. Electron irradiation induces strong morphological and compositional changes which are proposed to be connected with melting‐resolidification processes and surface phase segregation. SEE yield measurements allow to detect an oxygen depleted area with stoichiometric cationic composition surrounding the irradiated region. CL spectra recorded from this oxygen‐deficient area also show an enhanced 2.3 to 2.4 eV emission band in comparison with the spectra recorded from the non‐irradiated material. Strongly luminescent non‐superconducting phases appear in the irradiated regions, showing intense 3.1 and 0·78 to 0·81 eV emission bands.

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Cathodoluminescence Microscopy and Secondary Electron Emission in Mechanically Polished and Electron Irradiated YBa2Cu3O7−x Ceramics

Dı́az-Guerra

Piqueras

Tomashpolsky

et al. 1996

Phys. Stat. Sol. (a)

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Cathodoluminescence microscopy and spectroscopy of superconducting Bi2Sr2CaCu2O8+x single crystals

Dı́az-Guerra

Piqueras

1997

Physica C: Superconductivity

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Cathodoluminescence microscopy of high T c superconducting YBCO and BSCCO materials

Cited by 2 publications

References 10 publications

Cathodoluminescence Microscopy and Secondary Electron Emission in Mechanically Polished and Electron Irradiated YBa2Cu3O7−x Ceramics

Cathodoluminescence Microscopy and Secondary Electron Emission in Mechanically Polished and Electron Irradiated YBa2Cu3O7−x Ceramics

Cathodoluminescence microscopy and spectroscopy of superconducting Bi2Sr2CaCu2O8+x single crystals

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