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RT-SHPM imaging of permalloy microstructures and garnet films using new high performance InSb sensors
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Date
2002-01-01
Author
Kaval, M.
Oral, Ahmet
Dede, M.
Sandhu, A.
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Scanning Hall probe microscopy (SHPM) is a quantitative and noninvasive technique to image magnetic samples with high spatial and magnetic field resolution: ∼120 nm & 6×10-6T/√(Hz) at room temperature. A sub-micron Hall probe is scanned over the sample surface to measure the surface magnetic fields using conventional scanning tunneling microscopy-positioning techniques. We have developed new low noise, high performance InSb Hall sensors for room temperature scanning Hall probe microscopy (RT-SHPM), which has a noise level of 6×10-7T/√(Hz).
URI
https://hdl.handle.net/11511/94492
DOI
https://doi.org/10.1109/intmag.2002.1001104
Conference Name
2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
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Department of Physics, Conference / Seminar
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Scanning Hall Probe Microscopy (SHPM) is a quantitative and non-invasive technique for imaging localized surface magnetic field fluctuations such as ferromagnetic domains with high spatial and magnetic field resolution of similar to 50 nm and 7 mG/Hz(1/2) at room temperature. In the SHPM technique, scanning tunneling microscope (STM) or atomic force microscope (AFM) feedback is used to keep the Hall sensor in close proximity of the sample surface. However, STM tracking SHPM requires conductive samples; ther...
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A room temperature scanning micro-Hall probe microscope (RT-SHPM) was used for imaging stray magnetic field fluctuations at the surfaces of strontium ferrite permanent magnets (SFM) in the presence of external bias fields. The RT-SHPM enables the extremely fast, non-invasive, and quantitative measurement of localized surface magnetic fields on the sub-micron-scale. A 0.8 × 0.8 μm2 GaAs/AlGaAs micro-Hall probe (300K Hall coefficient = 0.3Ω/G; field sensitivity = 0.04 G/√Hz) with an integrated STM tip for pre...
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M. Kaval, A. Oral, M. Dede, and A. Sandhu, “RT-SHPM imaging of permalloy microstructures and garnet films using new high performance InSb sensors,” presented at the 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002, Amsterdam, Hollanda, 2002, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/94492.