### 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