N. Terada et al., PHOTOEMISSION SPECTROSCOPY OF CU1-XBA2CAN-1CUNO2N-DELTA CERAMICS AND THIN-FILMS(4), Journal of physics and chemistry of solids, 56(12), 1995, pp. 1883-1884
X-Ray photoemission spectroscopy has been performed on Cu1-xBa2Can-1Cu
nO2n+4-delta ceramics and epitaxial films. A considerable oxygen loss
from the vicinity of (BaO/CuOy/BaO) blocking layers has been observed
even on the in situ measured films or the ceramics just scraped in vac
uum. A heat treatment under 100% O-3 beam is useful to develop their i
ntrinsic surfaces. Binding energy of constituents of the treated sampl
es are similar to those of T1 system superconductors.