Abstract
For more, than the 30-year’ s period of development there were many applications of SQUIDs due to its high sensitivity and broad frequency band. One of the most recently developed research SQUID-based instrument is a scanning SQUID microscope (SSM). The first SSMs were based on low transition temperature (LTS) SQUIDs, operated at liquid helium temperature (~ 4.2 K) [1– 5], the appearance and successful development of high transition temperature (HTS) SQUIDs operated at liquid nitrogen temperature (~77 K) [6] considerably has expanded area of SQUID microscope researches and has opened a road to commercial applications. At present time SQUID microscopes are used for imaging superconducting and magnetic materials, currents flowing in circuits, imaging of high frequency electric and magnetic fields, biomagnetic research. Their capabilities are shown in the field of a nondestructive evaluation (NDE) by search of different defects in materials, metallic structures and hardware products of microelectronics.
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