New complex oxides in RBaThCuO systems (R = LaGd)

E. M. Kopnin, A. V. Mironov, E. V. Antipov, L. M. Kovba, L. G. Akselrud, I. G. Muttik, V. V. Moshchalkov

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8 Citations (Scopus)

Abstract

The new complex oxides R2Ba1.33Th0.67Cu3O8+δ (R = La, Pr) and La0.67Ba1.33R2-xThxCu3O8+δ (R = NdGd, x = 0.5, 0.67) were synthesized. These compounds have a similar structure to the Ce-223 high-Tc oxides. The oxygen content (or δ) was varied over a wide range after annealing at high oxygen pressure (up to 90 atm). Unit cell parameters and δ values for all the new phases were determined. The resistivities of these semiconducting compounds obey the law ρ{variant} = ρ{variant}oT. A single crystal of Nd2Ba1.5Th0.5Cu3-xAlxO8+δ (x = 0.3, δ = 0.8) was obtained and its structure was determined by X-ray single-crystal experiment (tetragonal system, space group I4 mmm, a = 3.9057(5) Å, c = 28.569(4) Å, Z = 2).

Original languageEnglish
Pages (from-to)30-36
Number of pages7
JournalJournal of Solid State Chemistry
Volume100
Issue number1
DOIs
Publication statusPublished - Sep 1992
Externally publishedYes

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