%0 Journal Article
%A Díaz-Guerra Viejo, Carlos
%A Piqueras de Noriega, Javier
%A Tomashpolsky, Y. Y.
%A Sadovskaya, N. V.
%T Electron beam induced structural changes in bi_2Sr_2CaCu_2O_(8+x) studied by  cathodoluminescence microscopy and secondary electron emission
%D 1997
%@ 0947-8396
%U https://hdl.handle.net/20.500.14352/59159
%X Bi_2Sr_2CaCu_2O_(8+x) superconducting ceramics have been irradiated in the scanning electron microscope (SEM), and the irradiation-induced effects investigated by cathodoluminescence (CL), secondary electron emission (SEE) and X-ray microanalysis. Electron beam irradiation causes a slight Bi depletion and an inhomogeneous Ca distribution. A higher CL intensity emission is found in the irradiated areas, where besides an enhancement of the oxygen content related 2.4 eV band, another CL bands probably related to new non-superconducting phases induced by irradiation can be observed. SEE yield measurements allow to detect an oxygen depleted region surrounding the irradiated areas. X-ray microanalysis shows that this intermediate region retains the cationic composition of the unaffected material. CL spectra from bright zones inside the same area also show a dominant 2.4 eV emission band, which supports its relation with oxygen deficiency or rearrangement in high-T-c superconductors.
%~