Excess magnetization due to the presence of the matrix in a commercialized ultra fine multifilamentary NbTi composite with very fine filaments and Cu30%Ni matrix

Author

Morita, Koji ; Ito, D.

Author_Institution

Tokyo Metropolitan Univ., Japan

Volume

32

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

2756

Lastpage

2759

Abstract

We are studying the relation between the occurrence of the proximity effect coupling and the a.c. critical current degradation at low field in an ultra line multifilamentary NbTi superconducting composite for a.c. use. The occurrence of the proximity effect coupling between the ultra fine filaments across the Cu30%Ni matrix in commercialized a.c. wires was confirmed by comparing magnetization for two wires with and without matrix. Excess magnetization due to the proximity effect coupling was observed in both magnetization of the initial magnetization curves and the hysteresis loop for the clad wire at low field. Based on the results, the a.c. quench current degradation mechanism for these a.c. wires at low field is discussed

Keywords

copper alloys; magnetic hysteresis; magnetisation; multifilamentary superconductors; nickel alloys; niobium alloys; proximity effect (superconductivity); superconducting materials; titanium alloys; AC critical current degradation; AC quench current degradation mechanism; Cu-30%Ni matrix; Cu-Ni; NbTi; clad wire at low field; commercialized ultra fine multifilamentary NbTi composite; excess magnetization; hysteresis loop; initial magnetization curves; proximity effect; very fine filaments; Commercialization; Couplings; Critical current; Degradation; Magnetization; Multifilamentary superconductors; Niobium compounds; Proximity effect; Superconducting filaments and wires; Titanium compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.511445

Filename

511445