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Critical current densities and irreversibility fields of high-Tc superconductors AuBa2Can−1CunO2n+3 (n=3,4) prepared under high pressure

✍ Scribed by S. Yu; E.M. Kopnin; E. Takayama-Muromachi

Book ID
104438367
Publisher
Institute of Physics and National Institute of Materials Science
Year
2003
Tongue
English
Weight
148 KB
Volume
4
Category
Article
ISSN
1468-6996

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✦ Synopsis

Critical current densities ðJ c Þ and irreversibility fields ðB irr Þ of high-T c superconductors AuBa 2 Ca n21 Cu n O 2nþ3 [Au-12(n 2 1)n, n ¼ 3; 4] prepared under high pressure were determined from the hysteresis in DC magnetization loop. Both the J c and B irr values of the Au-1234 phase were larger than those of Hg-and Bi-based cupurate superconductors, but smaller than those of the Y-123 superconductor. This result suggests that the electronic structure of Au-1234 is less anisotropic compared with the Hg-and Bi-phases. The Au-1223 phase showed very small J c values corresponding to its small superconducting volume fraction.

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