NDLI: LTS SQUID /spl radic/¿?? Microscopy: A Leap in sensitivity?.

Content Provider	IEEE Xplore Digital Library
Author	Baudenbacher, F. Fong, L.E. Holzer, J.R. Lima, E.A. McBride, K.
Copyright Year	2006
Description	Author affiliation: Vanderbilt Univ., Nashville (Baudenbacher, F.)
Abstract	Room-temperature (RT) sample scanning superconducting quantum interference device (SQUID) microscopy (SSM) is a very powerful and promising technique for imaging magnetic field distributions . A SQUID microscope with interchangeable sensor configurations for imaging magnetic fields of room-temperature (RT) samples with sub-millimeter resolution was developed. The sensors are mounted in the vacuum space of a cryostat and thermally anchored to the helium reservoir. A positioning mechanism allows us to adjust the sample-to-sensor spacing from the top of the Dewar. Combining microfluidic based devices and SQUID microscopy allows us to identify a moving single micron sized ferromagnetic particles with a magnetic moment of $10^{-14}$ $Am^{2}$ at a bandwidth of 2.5 KHz and a sensor to particle spacing of 95 mum. Although magnetic force microscopes (MFMs) have better moment sensitivities than SQUID microscopes, the current generation of SQUID microscopes have field sensitivities 105 times better than the MFM and do not suffer from the sample-instrument interactions that plague MFM-sensing of magnetically soft materials.
Starting Page	388
Ending Page	388
File Size	940963
Page Count	1
File Format	PDF
ISBN	1424414792
DOI	10.1109/INTMAG.2006.376112
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Intermag Conference
Subject Keyword	SQUIDs Magnetic force microscopy Magnetic sensors Soft magnetic materials Magnetic materials Superconducting devices Interference Magnetic fields Image sensors Image resolution
Content Type	Text
Resource Type	Article

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