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The
scanning Hall probe microscope (SHPM) is a class of
scanning probe microscope which incorporates the accurate sample approach and
positioning of the scanning tunnelling microscope with a semiconductor Hall sensor. This combination
allows a map of the magnetic induction associated with a sample to be
created. Current state
of the art SHPM systems
utilise 2D electron
gas materials (e.g. Gaas/algaas) to provide high spatial resolution (>300 nm) imaging with high
magnetic field sensitivity. Unlike the magnetic force microscope the SHPM
provides direct quantitative information on the magnetic state of a material. The SHPM can also image magnetic
induction under applied fields up to ~1 tesla and over a wide range of temperatures (millikelvins to 300 K).
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