GOLD SUBSTITUTION AND SUPERCONDUCTIVITY IN YBA2CU3O7-DELTA-AU

Authors
STANEK J SZYTULA A TOMKOWICZ Z BAJOREK A BALANDA M GUILLOT M
Citation
J. Stanek et al., GOLD SUBSTITUTION AND SUPERCONDUCTIVITY IN YBA2CU3O7-DELTA-AU, Physica. C, Superconductivity, 235, 1994, pp. 383-384
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
1
Pages
383 - 384
Database
ISI
SICI code
0921-4534(1994)235:<383:GSASIY>2.0.ZU;2-S
Abstract
The samples of nominal compositions (Y1-zAuz)Ba2Cu3O7-delta, Y(Ba0.96A u0.04)(2)Cu3O7-delta, YBa2(Cu0.97Au0.03)(3)O-7-delta, YBa2Cu3Au0.097O7 -delta and YBa2Cu3O7-delta were synthesized and comparatively studied by means of electrical resistance, AC and DC magnetometric and Au-197 Mossbauer effect methods. The (Y1-zAuz)Ba2Cu3O7-delta and, particularl y, (Y0.95Au0.05)Ba2Cu3O7-delta sample showed better homogeneity and sh arper transition to the superconducting state than its YBa2 (Cu0.97Au0 .03)(3)O-7-delta counterpart. It is concluded that Au substitutes for Cu(1) chain position while excess Cu atoms enter other, probably Y, la ttice positions.