Room temperature sub-micron magnetic imaging by scanning hall probe microscopy

Date
2001
Authors
Sandhu, A.
Masuda, H.
Oral, A.
Bending, S. J.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Print ISSN
0021-4922
Electronic ISSN
Publisher
Japan Society of Applied Physics
Volume
40
Issue
6B
Pages
4321 - 4324
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
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.

Course
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Book Title
Keywords
Garnets, Hall 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
Citation
Published Version (Please cite this version)