Room temperature sub-micron magnetic imaging by scanning hall probe microscopy
Date
2001Source Title
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Print ISSN
0021-4922
Publisher
Japan Society of Applied Physics
Volume
40
Issue
6B
Pages
4321 - 4324
Language
English
Type
ArticleItem Usage Stats
204
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196
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Abstract
An ultra-high sensitive room temperature scanning Hall probe microscope (RT-SHPM) system incorporating a GaAs/A1GaAs 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 μm×0.8 μm, 0.3 Ω/G and 0.04 G/√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.
Keywords
GarnetsHall probe sensor
Magnetic domains
Magnetic imaging
Magnetic recording media
Scanning Hall probe microscopy
Ferromagnetic materials
Floppy disk storage
Garnets
Magnetic bubbles
Magnetic domains
Magnetic field effects
Magnetic hysteresis
Magnetization
Optical microscopy
Scanning
Thin films
Magnetic imaging
Scanning hall probe microscopes (SHPM)
Imaging techniques
Permalink
http://hdl.handle.net/11693/24856Collections
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