Scaling of current-voltage curves of Bi-2212 tape wire

Author

Kiuchi, M. ; Noguchi, K. ; Tagomori, M. ; Matsushita, T. ; Hasegawa, T.

Author_Institution

Dept. of Comput. Sci. & Electron., Kyushu Inst. of Technol., Iizuka, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2114

Lastpage

2117

Abstract

The current-voltage curves are measured for a dip-coated Bi-2212 tape wire at various temperatures under the magnetic field parallel to the c-axis. It is found that the current-voltage curves are approximately scaled on two master curves by normalizing as predicted in the vortex glass-liquid transition theory. However, the obtained dynamic critical index was about 3 and too small in spite of the two-dimensional flux line system. These results are compared with the theoretical analysis based on the flux creep-flow model taking account of the distribution of pinning strength. It is found that the theoretical result approximately explains the experimental result on the scaling behavior, the critical indices and the transition line.

Keywords

bismuth compounds; calcium compounds; flux creep; flux flow; flux pinning; flux-line lattice; high-temperature superconductors; strontium compounds; superconducting tapes; BiSrCaCuO; BiSrCaCuO-2212 tape wire; HTSC; critical indices; current-voltage curves; dynamic critical index; flux creep-flow model; magnetic field; pinning strength; scaling; scaling behavior; transition line; two-dimensional flux line system; vortex glass-liquid transition theory; Creep; Flux pinning; High temperature superconductors; Magnetic analysis; Magnetic field measurement; Superconducting films; Tiles; Type II superconductors; Voltage; Wire;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621009

Filename

621009