ISSN:
1572-9605
Schlagwort(e):
Thallium cuprates
;
substitution
;
flux pinning
;
critical current and morphology
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
Abstract Compounds of the system, Tl1−xBixBa2Ca2Cu3O9, were synthesized and studied. Bi substitutes at the Tl-site for values of x up to x=0.2. The superconducting transition temperature, Tc, increases from 110K for x=0.0 to 116K for x=0.2. SEM images reveal a plate-like morphology which is highly suitable for powder-in-tube processing. M-H loops show that the Bi-substituted phase has significantly better low temperature flux pinning properties than the pristine Tl-cuprate, and exhibits only a weak dependence on temperature and field when compared to that of unsubstituted phase. The Jc values calculated using the Bean model are: 3 × 107 A/cm2 at 10K,1T and 2 × 104 A/cm2 at 77K.1T. Substitution of 20% of Bi in TlBa2Ca2Cu3O9 makes the compound an excellent choice for magnet wire applications at relatively low temperatures.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1022654501377
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