ISSN:
1572-9605
Keywords:
Tl based superconductors
;
synthesis
;
phase formation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract Polycrystalline (Tl,Bi)(Sr,Ba)2Ca2Cu3Ox (Tl,Bi-1223) samples were synthesized by mixing the precursor with 5wt% micrometer-size LaAlO3 or LSAT particles. These particles appeared to provide suitable surface for epitaxial growth of Tl,Bi-1223 phase. The growth zone is typically 5 - 10 μm thick and several zones can coalesce to form a larger zone. Consequently, there is a dramatic increase in the magnetization signals, indicating the increased superconducting volume fraction. The enhancement is uniform in the external magnetic field. The Tc of the samples was not affected by the additives and the transition remained sharp. The results suggest that a controlled growth of Tl-1223 grain with improved texture can be achieved by adding the growth centers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022651828210
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