Publication: Homogeneity assessment of YBa_2Cu_3O_(7-x) single crystals by cathodoluminescence microscopy
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1996-07-15
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American Institute of Physics
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Abstract
Cathodoluminescence (CL) of YBa_2Cu_3O_(7-x) single crystals has been investigated in the scanning electron microscope, Some regions of the crystals, generally related to steps or other growth features, show enhanced CL Intensity. Spectra show the presence of two emission bands centered at about 2.85 and 2.3-2.4 eV, respectively. In the regions of higher CL intensity, the 2.3 eV band, which has been attributed to defects in the oxygen sublattice, shows a higher relative intensity. (C) 1996 Americans Institute of Physics.
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© 1996 American Institute of Physics.
This work was supported by DGICYT (Projects No. PB93-1256 and MAT 95-1184E). C.D.G. acknowledges MEC for a FPI research grant.
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