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Lead-NMR study of BaPb1−x(Sb/Bi)xO3

✍ Scribed by F.J.M. Benschop; H.B. Brom; H.W. Zandbergen; R.J. Cava

Book ID
103949600
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
214 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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✦ Synopsis

Recent

MSssbauer experiments on BaPbl-= Sbx Oa revealed only the presence of Sb(V), while in BaPbl-~ Bix Oa in the semiconducting phase the Bi-charge disproportionation is well established. We find a similar asymmetry in the NMR spectra. The NMR spectra on semiconducting BaPbl-xSbxO3 clearly show the charge disproportionation of lead, while in BaPbl-xBixO3 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 BaPbl-xSbxO3 is proposed with a miscibility gap in the range of 0.35 < x < 0.50.

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