A milliKelvin scanning Hall probe microscope for high resolution magnetic imaging

Volodymyr V Khotkevych, Simon J Bending

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The design and performance of a novel scanning Hall probe microscope for milliKelvin magnetic imaging with submicron lateral resolution is presented. The microscope head is housed in the vacuum chamber of a commercial He-3-refrigerator and operates between room temperature and 300 mK in magnetic fields up to 10 T. Mapping of the local magnetic induction at the sample surface is performed by a micro-fabricated 2DEG Hall probe equipped with an integrated STM tip. The latter provides a reliable mechanism of surface tracking by sensing and controlling the tunnel currents. We discuss the results of tests of the system and illustrate its potential with images of suitable reference samples captured in different modes of operation.
Original languageEnglish
Article number012021
Number of pages4
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2009
Event25th International Conference on Low Temperature Physics - Amsterdam, Netherlands
Duration: 6 Aug 200813 Aug 2008


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