Dependence of Irreversibility Field on the Thickness
of Superconducting Layer
Title, author, abstract
- title
-
Dependence of Irreversibility Field on the Thickness
of Superconducting Layer
- authors
-
Miki Tagomori(1), Masaru Kiuchi(1),
Teruo Mstsushita(1,2)
Takayo Hasegawa(3)
(1)Department of Computer Science and Electronics, Kyushu
Institute of Technology,
680--4 Kawazu, Iizuka, 820 JAPAN
(2)Graduate School of
Information Science and Electrical Engineering (ISEE),
Kyushu University,
6--10--1 Hakozaki, Higashi-ku, Fukuoka 812--81, Japan
(3)Showa Electric Wire and Cable Co. Ltd., 2--1--1
Odasakae, Kawasaki-ku, Kawasaki 210, Japan
- abstract
-
The irreversibility field was observed for two multilayered
Bi-2212 tape wires with different thicknesses of
superconducting layers. The irreversibility field does not
depend on the thickness of superconducting layers but is
determined only by the flux pinning strength. The result
agrees well with the theoretical analysis of the flux
creep-flow model. The analysis shows that the longitudinal
flux bundle size is of the order of a few $\mu$m on the
irreversibility line. The present experimental result is
reasonable, since the flux bundle size is shorter than the
thickness of superconducting layers, resulting in the
three-dimensional pinning.
- Original paper appears in
-
10th International Symposium on Superconductivity
October 28--30, 1997
Gifu, Japan