A CUBIC PHASE IN CERAMIC Y-BA-CU-O DOPED WITH NB

Authors
STRUKOVA GK SMIRNOVA IS BAZHENOV AV SHEVCHENKO SA KOLYUBAKIN AI DILANIAN RA SHEKHTMAN VS
Citation
Gk. Strukova et al., A CUBIC PHASE IN CERAMIC Y-BA-CU-O DOPED WITH NB, Physica. C, Superconductivity, 267(1-2), 1996, pp. 67-73
Citations number
10
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
267
Issue
1-2
Year of publication
1996
Pages
67 - 73
Database
ISI
SICI code
0921-4534(1996)267:1-2<67:ACPICY>2.0.ZU;2-9
Abstract
The almost-single-phase ceramic c-YBa2Cu3-x(Nb-x)O-y (x = 0.05-0.20) w ith cubic symmetry has been synthesized by thermolysis of an ammonium nitrate melt containing Y, Ba, Cu and Nb components. XRD patterns, the rmogravimetric curves, far-infrared reflection spectra, and the temper ature dependence of resistivity have been studied in the samples c-YBa 2Cu2.86(Nb-0.14)(y) and YBa4Cu2.86(Nb-0.14)O-y prepared by this method . On this basis, the conclusion is made that c-YBa2Cu3-x(Nb-x)O-y is t he well known cubic phase YBa4Cu3Oy containing about 50% Ba vacancies and with the same lattice parameter a = 8.11 Angstrom.