Title :
Noise measurements in a composite niobium/YBCO SQUID and determination of the magnetic noise by direct measurement
Author :
Harrop, S.P. ; Keene, M.N. ; Muirhead, C.M. ; Gough, C.E.
Author_Institution :
Birmingham Univ., UK
fDate :
3/1/1991 12:00:00 AM
Abstract :
The noise performance of a composite niobium/YBCO point contact two-hole SQUID was measured at 4.2 K in both RF and DC bias modes. The noise was measured by a technique which allowed the flux noise component to be measured. The flux noise was found to be the same in both bias modes. A direct measurement of the noise in a single hole in the same sample was made as a function of temperature and was found to display two peaks. Possible causes are discussed
Keywords :
SQUIDs; barium compounds; high-temperature superconductors; niobium; yttrium compounds; 4.2 K; DC bias modes; Nb-YBaCuO; RF bias modes; SQUID; direct measurement; flux noise component; high-temperature superconductors; magnetic noise; point contact two-hole SQUID; single hole; Contacts; Fasteners; Lead; Magnetic noise; Niobium; Noise measurement; SQUIDs; Superconducting device noise; Superconducting transition temperature; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
