Title :
Observations of flux motion in niobium films
Author :
Xiao, Y.M. ; Keiser, G.M.
Author_Institution :
W.W. Hansen Lab., Stanford Univ., CA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
A magnetic field trapped in a superconducting sphere was examined at temperatures from 4.6 K to 5.5 K. The sphere was the rotor of a precision gyroscope and was made of fused quartz and coated with a sputtered niobium film. The rotor diameter was 3.8 cm. The film thickness was 2.5 μm. The tests were carried out at an ambient magnetic field of about 1 mG. Unexpected instability of the trapped field was observed. The experimental results and possible explanations are presented
Keywords :
flux flow; gyroscopes; niobium; superconducting thin films; type II superconductors; 4.6 to 5.5 K; Nb-SiO2; film thickness; flux motion; instability; magnetic field; precision gyroscope; rotor diameter; sputtered coatings; superconducting sphere; Coatings; Gyroscopes; Magnetic field measurement; Magnetic fields; Magnetic films; Niobium; Superconducting coils; Superconducting films; Temperature; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
