Title :
Properties of the YBCO thin film interferometers fabricated on ZrO 2 bicrystal substrates
Author :
Kovalev, A.S. ; Krasnosvobotsev, S.I. ; Kuprijanov, M.Yu. ; Maresov, A.G. ; Ozerenko, A.A. ; Pechen, E.V. ; Pirogov, V.G. ; Pogosova, I.S. ; Snigirev, O.V. ; Vengrus, I.I.
Author_Institution :
Nucl. Phys. Res. Inst., Moscow, USSR
fDate :
3/1/1991 12:00:00 AM
Abstract :
The properties of DC SQUIDs made of YBCO thin film deposited on ZrO2 bicrystal substrate and the nature of the fabricated Josephson junctions have been studied. It is found that the characteristics of the junctions are similar to those of the SNS structures with paramagnetic impurities in the N layer. A level of interferometer noise close to 5×10-4 Φ0/Hz1/2 and a magnetic field sensitivity of 10-10 T/Hz1/2 at frequencies higher than 25 Hz in the usual feedback mode of the SQUID operation have been achieved at 77 K
Keywords :
Josephson effect; SQUIDs; barium compounds; electron device noise; high-temperature superconductors; superconducting thin films; yttrium compounds; 25 Hz; 77 K; DC SQUIDs; Josephson junctions; YBCO; YBaCuO-ZrO2; ZrO2 bicrystal substrates; feedback mode; high temperature superconductors; interferometer noise; magnetic field sensitivity; thin film interferometers; weak link model; Impurities; Interferometers; Josephson junctions; Magnetic noise; Paramagnetic materials; SQUIDs; Sputtering; Substrates; Transistors; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
