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

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2137

Lastpage

2141

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403005

Filename

403005