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Room temperature sub-micron magnetic imaging by scanning Hall probe microscopy
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Date
2001-06-01
Author
SANDHU, ADARSH
MASUDA, HİROSHİ
Oral, Ahmet
BENDİNG, SİMON J
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An ultra-high sensitive room temperature scanning Hall probe microscope (RT-SHPM) system incorporating a GaAs/AlGaAs micro-Hall probe was used for the direct magnetic imaging of localized magnetic field fluctuations in very close proximity to the surface of ferromagnetic materials. The active area, Hall coefficient and field sensitivity of the Hall probe were 0.8 mum x 0.8 mum, 0.3 Omega /G and 0.04G/root Hz, respectively. The use of a semiconducting Hall probe sensor enabled measurements in the presence of externally applied magnetic fields. Samples studied included magnetic recording media. demagnetized strontium ferrite permanent magnets, and low coercivity perpendicular garnet thin films. The RT-SHPM offers a simple means for quantitatively monitoring sub-micron magnetic domain structures at room temperature.
Subject Keywords
General Engineering
,
General Physics and Astronomy
URI
https://hdl.handle.net/11511/49072
Journal
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
DOI
https://doi.org/10.1143/jjap.40.4321
Collections
Department of Physics, Article