High-resolution scanning magnetometry based on a superconducting quantum interferometer

Methods and instruments using superconducting quantum interference devices (SQUIDs) which are applied for measuring and displaying scattered magnetic fields near the surface of submagnetic physical objects are reviewed. The p rinciples of operation, design features, and main characteristics of scanni ng SQUID magnetometers; are described. The efficiency of these devices in f undamental research and applications is analyzed. The characteristics of di fferent types of magnetic microscopes are compared.