Abstract
Two types of scanning magnetic microscopes (MM) are known nowadays: force magnetic microscopes (FMM) and non-force MM (NFMM) ones. The second type of MM can be used to measure a distribution of the vertical component of magnetic fields over surfaces, including cases such as in a cavity of solid test objects (TO) and inside a liquid TO, without external forces or magnetic influences on the TO. A NFMM with a SQUID detector (SQUID-MM) has the highest magnetic sensitivity among all types of MM. Because of these SQUID-MM features, it is suitable for use in developments of smart materials. For example, it may be used for: counter-terrorism investigations by surveying and decoding of the slight slots left after deletion of the magnetic records on a computer disc by traditional magnetic “scrubber” procedures; surveying and decoding of minute magnetic indications left after a mechanical scrubber procedure of mechanically stamped records of serial numbers on cars and other objects; surveying and measuring magnetic properties of small magnetic particles of the object under investigation for identification of the object; high-sensitivity reading of magnetic records on perspective superconducting carriers. The design of our three-channel SQUID-MM is described in this article. Magnetic 3D scan-pictures of several TO’s are presented also for demonstration.
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Bondarenko, S., Nakagawa, N. (2006). SQUID–BASED MAGNETIC MICROSCOPE. In: Franse, J., Eremenko, V., Sirenko, V. (eds) Smart Materials for Ranging Systems. NATO Science Series II: Mathematics, Physics and Chemistry, vol 226. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4646-4_11
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DOI: https://doi.org/10.1007/1-4020-4646-4_11
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4644-5
Online ISBN: 978-1-4020-4646-9
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