Title :
High-T/sub c/ RF SQUID magnetometer system for high-resolution magnetic imaging
Author :
Tinchev, S.S. ; Hinken, J.H. ; Stiller, M. ; Baranyak, A. ; Hartmann, D.
Author_Institution :
Forschungsgesellschaft fur Inf. mbH, Bad Salzdetfurth, Germany
fDate :
3/1/1993 12:00:00 AM
Abstract :
A high-T/sub c/ RF superconducting quantum interference device (SQUID) magnetometer system has been developed. The SQUID sensor is made from YBCO thin films using local oxygen-ion-irradiated microbridges. The SQUID is cooled by liquid nitrogen in an open cryostat. For the scanning process the sample is placed on a nonmagnetic stage inside a magnetic shield. The instrument has a spatial resolution of about one millimeter, which can be further improved. The system is used for nondestructive testing and for detecting the magnetic fields generated by corrosion currents.<>
Keywords :
SQUIDs; barium compounds; high-temperature superconductors; magnetometers; superconducting thin films; yttrium compounds; HTSC; NDT; RF SQUID magnetometer system; SQUID sensor; YBa/sub 2/Cu/sub 3/O/sub 7/ thin films; corrosion currents; high T/sub c/ films; high-resolution magnetic imaging; liquid nitrogen; magnetic fields; magnetic shield; microbridges; nondestructive testing; nonmagnetic stage; open cryostat; scanning process; spatial resolution; superconducting quantum interference device; Magnetic sensors; Magnetic shielding; Nitrogen; Radio frequency; Radiofrequency interference; SQUID magnetometers; Superconducting devices; Superconducting thin films; Thin film sensors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
