Comparative Studies of 2212 Type Superconductors In The TL-HG-BA-SR-CA-CU-O System.

Autor:	Valldor, M., Bryntse, I.
Zdroj:	Journal of Low Temperature Physics; Nov1999, Vol. 117 Issue 3/4, p867-871, 5p
Abstrakt:	Superconductors in the Tl1.3 Hg0.7 Ba2-x Srx+y Ca1-y Cu2 O7+δ system (sp.gr. I4/mmm) were prepared through standard powder reaction in closed vessels. The transition temperatures (Tc ) for the different stoichiometries spanned from 100 to 45 K. Both cell parameters (a and c) increased in proportion to Tc . These changes were mainly related to the distribution of size differing atoms at two sites in the structure and not to the oxidation state of Cu. The presence of Ba seemed favorable when comparing composition and Tc . [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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