RT Journal Article
T1 Cathodoluminescence microscopy and secondary electron emission in mechanically polished and electron irradiated YBa_2Cu_3O_(7-x) ceramics
A1 Díaz-Guerra Viejo, Carlos
A1 Piqueras De Noriega, Francisco Javier
A1 Tomashpolsky, Y. Y.
A1 Sadovskaya, N. V.
AB 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.
PB Akademie Verlag Gmbh
SN 0031-8965
YR 1996
FD 1996-06-16
LK https://hdl.handle.net/20.500.14352/59211
UL https://hdl.handle.net/20.500.14352/59211
NO © 1996 WILEY-VCH Verlag GmbH & Co. KGaA
DS Docta Complutense
RD 10 abr 2025