IRREVERSIBILITY FIELD IN MULTIFILAMENTARY
Nb-Ti WIRES WITH FINE FILAMENTS
Title, author, abstract
- title
-
IRREVERSIBILITY FIELD IN MULTIFILAMENTARY
Nb-Ti WIRES WITH FINE FILAMENTS
- authors
-
Hiroshi Matsuoka1, Edmund S. Otabe1 Teruo
Matsushita1 and
Tsugio Hamada2
1 Department of Computer Science and Electronics, Kyushu
Institute of Technology,
680--4 Kawazu, Iizuka, 820 JAPAN
2 Department of Electrical Engineering, Miyakonojo College of Technology,
473-1 Yoshio, Miyakonojo, 885 JAPAN
- abstract
-
The irreversibility field of multifilamentary Nb-Ti wires
was measured and found to be seriously suppressed due to the
flux creep at high temperatures while the critical current
density was fairy large. This is explained from the small
pinning potential compared with a bulk specimen, since the
pinning potential is limited by the size of the
filaments. The experimental result is compared with the
prediction based on the flux creep theory. Although the
degradation of the irreversibility field is theoretically
explained by the mechanism of flux creep, there exists a
quantitative difference in the vicinity of critical
temperature. This difference may come from the
inhomogeneities of the superconducting property or the flux
pinning strength in the specimens.
- Original paper appears in
-
9th International Symposium on Superconductivity
October 21--25, 1996
Sapporo, Hokkaido, Japan