SCALING OF CURRENT-VOLTAGE CHARACTERISTICS IN
SUPERCONDUCTING Bi-2223
TAPE WIRES
Title, author, abstract
- title
-
SCALING OF CURRENT-VOLTAGE CHARACTERISTICS IN
SUPERCONDUCTING Bi-2223
TAPE WIRES
- authors
-
M. Kiuchi$^{1}$, K. Noguchi$^{1}$, T.
Matsushita$^{1}$, T. Kato$^{2}$ , T. Hikata$^{2}$
K. Sato$^{2}$
$^1$Department of Computer Science and
Electronics, Kyushu Institute of Technology,
680--4 Kawazu, Iizuka 820, Japan
$^{2}$Osaka Research
Laboratories, Sumitomo Electric Industries, Ltd. 1--1--3
Shimaya,
Konohana-ku, Osaka 554, Japan
- abstract
-
The current-voltage curves are measured for two Bi-2223 tape
wires at various temperatures under the magnetic field
parallel to the $c$-axis. It is found that the
current-voltage characteristics are scaled on two master
curves by normalizing as predicted in the vortex
glass-liquid transition theory. The obtained dynamic
critical index, $z$, increases and the static one, $\nu$,
decreases with increasing magnetic field. The transition
line shifts to higher temperature with increasing critical
current density of the wire. These experimental results are
compared with the flux creep-flow theory in which the
distribution of flux pinning strength is taken into account.
It is found that the scaling behavior, the critical indices
and the transition line are well describable by the flux
creep-flow theory.
- Original paper appears in
-
8th International Symposium on Superconductivity
October 30-November 2, 1995
Hmamatsu, Shizuoka, Japan