EFFECT OF SUBSTITUTION AT THE BARIUM SITE IN YBA2CU3O7-DELTA

Authors
RAMAN NS VISWANATHAN B
Citation
Ns. Raman et B. Viswanathan, EFFECT OF SUBSTITUTION AT THE BARIUM SITE IN YBA2CU3O7-DELTA, Bulletin of Materials Science, 16(5), 1993, pp. 381-391
Citations number
21
Categorie Soggetti
Material Science
Journal title
Bulletin of Materials Science → ACNP
ISSN journal
02504707
Volume
16
Issue
5
Year of publication
1993
Pages
381 - 391
Database
ISI
SICI code
0250-4707(1993)16:5<381:EOSATB>2.0.ZU;2-U
Abstract
The oxygen content in YBa2Cu3O7-delta has been varied by substitution at Ba site with Sr or K and its influence on the structural and superc onducting properties has been studied. These properties are compared w ith that of unsubstituted YBa2Cu3O7-delta prepared by quenching. The i ncrease in delta value of YBa2Cu3O7-delta decreases the T(c) drastical ly, whereas in YBa2-xKxCu3O7-delta system increase in the delta value (as high as 0-92) does not affect the superconducting transition tempe rature, which remains above 77 K. In the YBa2-xSrxCu3O7-delta system, as Sr content increases there is marginal decrease in the oxygen conte nt as well as in the superconducting transition temperature.