High-frequency magnetic microscopy using high-Tc SQUID

Authors :: Black, R.C.
Wellstood, F.C.
Dantsker, E.
Miklich, A.H.
Koelle, D.
Ludwig, F.
Clarke, Judith
Source :: IEEE Transactions on Applied Superconductivity. June, 1995, Vol. 5 Issue 2, p2137, 5 p.
Publication Year :: 1995
Abstract: The feasibility of using a high-critical temperature superconducting quantum interference device (SQUID) in obtaining high frequency magnetic microscopic images is evaluated through experimental procedures. A SQUID-based microscope is designed and employed in imaging subsurface defects in metal structures at frequencies ranging from zero to 200 GHz. Results show that the SQUID-based microscope is a very useful tool for nondestructive testing of metals.