RT-SHPM imaging of permalloy microstructures and garnet films using new high performance InSb sensors

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2002-01-01

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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) using quartz crystal AFM feedback Dede, M.; Uerkmen, K.; Girisen, Oe.; Atabak, M.; Oral, Ahmet; Farrer, I.; Ritchie, D. (American Scientific Publishers, 2008-02-01) 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...
3D scanning Hall probe microscopy with 700 nm resolution DEDE, MUNIR; AKRAM, RİZWAN; Oral, Ahmet (2016-10-31) In this report, we present a three dimensional (3D) imaging of magnetic field vector (B) over right arrow (x,y,z) emanating from the magnetic material surfaces using a scanning Hall probe microscopy (3D-SHPM) down to a 700 nm spatial resolution. The Hall probe is used to measure B-z(x,y) on the specimen surface at different heights with the step size of Delta z = 250 nm, as we move away from the surface in z direction, until the field decays to zero. These set of images are then used to get partial derivati...
Scanning Hall probe microscopy of superconductors and magnetic materials Oral, Ahmet; Henini, M (1996-03-01) We describe results from a scanning Hall probe microscope operating in a broad temperature range, 4-300 K. A submicron Hall probe manufactured in a GaAs/AlGaAs two-dimensional electron gas is scanned over the sample to measure the surface magnetic fields using conventional scanning tunneling microscopy positioning techniques, The magnetic field structure of the sample together with the topography can be obtained simultaneously, The technique is noninvasive with an extremely low self-field of < 10(-2) G and ...
Direct and real-time observation of sub-micron domain dynamics in magnetically biased strontium ferrite permanent magnets by room temperature scanning micro-Hall probe microscopy Sandhu, Adarsh; Iida, Naoji; Masuda, Hiroshi; Oral, Ahmet; Bending, Simon J. (2001-01-01) 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...

Citation Formats

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.