Title :
High-frequency magnetic microscopy using a high-T/sub c/ SQUID
Author :
Black, R.C. ; Wellstood, F.C. ; Dantsker, E. ; Miklich, A.H. ; Koelle, D. ; Ludwig, F. ; Clarke, J.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have used a liquid-nitrogen-cooled scanning SQUID microscope to obtain magnetic images at frequencies ranging from zero to 200 GHz, that is, from audio frequencies through the radio frequency band and into the millimeter microwave band. We present images of thin film and bulk metallic samples, with a spatial resolution of about 30 /spl mu/m, taken using various readout schemes we have developed.<>
Keywords :
SQUID magnetometers; barium compounds; high-temperature superconductors; microscopes; microwave imaging; millimetre wave imaging; yttrium compounds; 0 to 200 GHz; SrTiO/sub 3/; YBa/sub 2/Cu/sub 3/O/sub 7/-SrTiO/sub 3/; audio frequencies; bulk metallic samples; high-T/sub c/ SQUID; high-frequency magnetic microscopy; magnetic images; millimeter microwave band; radio frequency band; readout schemes; scanning SQUID microscope; spatial resolution; thin film metallic samples; Frequency; Magnetic fields; Magnetic force microscopy; Magnetostatics; Micromagnetics; Physics; SQUIDs; Spatial resolution; Superconducting magnets; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
