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Room temperature scanning micro-Hall probe microscope imaging of ferromagnetic microstructures in the presence of 2.5 Tesla pulsed magnetic fields generated by an integrated mini coil
Date
2002-12-01
Author
Sandhu, A
Masuda, H
Oral, Ahmet
Metadata
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A unique magnetic imaging system comprising of a room temperature scanning Hall probe microscope with an integrated mini-coil capable of generating pulsed magnetic fields up to 2.5 Tesla (width of 3 ms) was developed for the direct and non-invasive magnetic imaging of ferromagnetic micro-domains in the presence of extremely large external pulsed magnetic fields without adverse vibrational disturbance of the sample during measurements. The system was successfully used for magnetic imaging of the erasure process of bit patterns on the surface of IAMB written floppy disks and the dynamics of micro-domain structures of demagnetized strontium ferrite permanent magnets under large external pulsed magnetic fields.
URI
https://hdl.handle.net/11511/94442
Journal
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS
DOI
https://doi.org/10.1143/jjap.41.l1402
Collections
Department of Physics, Article
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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...
Room temperature scanning micro-Hall probe microscopy under extremely large pulsed magnetic fields
Sandhu, A; Masuda, H; Oral, Ahmet (2003-09-01)
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Room temperature scanning Hall probe microscopy using GaAs/AlGaAs and Bi micro-hall probes
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Room temperature scanning micro-Hall probe microscopy under extremely large pulsed magnetic fields
Sandhu, A.; Masuda, H.; Oral, Ahmet (2003-01-01)
© 2003 IEEE.In this paper, we describe the use of pulsed magnetic field as a well established method for producing extremely large fields but the integration of pulse coils and peripheral instrumentation with the RT-SHPM necessitates extreme care due to the adverse effects of external vibrations during continuous magnetic imaging measurements.
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A. Sandhu, H. Masuda, and A. Oral, “Room temperature scanning micro-Hall probe microscope imaging of ferromagnetic microstructures in the presence of 2.5 Tesla pulsed magnetic fields generated by an integrated mini coil,”
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS
, vol. 41, no. 12A, pp. 0–0, 2002, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/94442.