LEAD-NMR STUDY OF BAPB1-X(SB BI)(X)O-3

Citation
Fjm. Benschop et al., LEAD-NMR STUDY OF BAPB1-X(SB BI)(X)O-3, Physica. C, Superconductivity, 235, 1994, pp. 2527-2528
Citations number
8
Categorie Soggetti
Physics, Applied
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
4
Pages
2527 - 2528
Database
ISI
SICI code
0921-4534(1994)235:<2527:LSOBB>2.0.ZU;2-C
Abstract
Recent Mossbauer experiments on BaPb1-xSbxO3 revealed only the presenc e of Sb(V), while in BaPb1-xBixO3 in the semiconducting phase the Bi-c harge disproportionation is well established. We find a similar asymme try in the NMR spectra. The NMR spectra on semiconducting BaPb1-xSbxO3 clearly show the charge disproportionation of lead, while in BaPb1-xB ixO3 in the semiconducting phase only Pb(IV) is observed. The metallic phases of the Sb-doped compounds show one lead resonance line. Based on the NMR spectra and the elemental analysis a phase diagram for BaPb 1-xSbxO3 is proposed with a miscibility gap in the range of 0.35 < x < 0.50.