ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The superconducting compound YBa2Cu3O7−x (YBCO) and oxides of copper (CuO and mixture of CuO and Cu2O) have been examined by secondary-ion-mass spectrometry (SIMS). The results support the fact that two kinds of copper (from the consideration of bonding and valence state) exist in YBCO—one in the basal planes of charge reservoir layers and the other in the conduction layers. The bonding of Cu-O in the CuO2 conduction layer unit is similar to that in CuO. No Cu+++ secondary ions could be detected in the SIMS spectrum, in agreement with electron spectroscopy for chemical analysis, extended x-ray-absorption fine structure, and electron probe microanalysis measurements reported earlier. A plausible explanation has been given for this.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.353098
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