AC susceptibility and filament coupling of multifilamentary superconducting wires

Author

Yasohama, K. ; Kubota, Y. ; Ogasawara, T.

Author_Institution

Coll. of Sci. & Technol., Nihon Univ., Tokyo, Japan

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

138

Lastpage

141

Abstract

The authors have studied proximity effect coupling on multifilamentary wires by measuring AC susceptibility. AC susceptibilities were measured on three kinds of samples. One was a Nb-multifilamentary wire with a Cu matrix, and the others were NbTi wires differing in the matrix, Cu or CuNi. A peak of the proximity effect coupling loss was seen as a function of temperature. It was foud that the peak temperature depends strongly on the measuring field and filament spacing. It decreased consistently with an increase in the applied field and the filament spacing. The coupling depends on the matrix, and no coupling peak was observed for the CuNi matrix wire at temperatures above 4.2 K.<>

Keywords

composite superconductors; losses; magnetic susceptibility; proximity effect; AC susceptibility; Cu; Nb-Cu; NbTi; NbTi-Cu; NbTi-CuNi; filament coupling; multifilamentary superconducting wires; peak temperature; proximity effect coupling; Couplings; Frequency; Magnetic field measurement; Magnetic hysteresis; Niobium compounds; Proximity effect; Superconducting filaments and wires; Temperature dependence; Titanium compounds; Transmission line matrix methods;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233689

Filename

233689