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Real-time scanning hall probe microscopy
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Date
1996-08-26
Author
Oral, Ahmet
BENDİNG, S J
HENİNİ, M
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We describe a low-noise scanning Hall probe microscope having unprecedented magnetic field sensitivity (similar to 2.9x10(-8) T/root Hz at 77 K), high spatial resolution, (similar to 0.85 mu m),nd operating in real-time (similar to 1 frame/s) for studying flux profiles at surfaces. A submicron Hall probe manufactured in a GaAs/A1GaAs two-dimensional electron gas (2DEG) is scanned over the sample to measure the surface magnetic fields using conventional scanning tunneling microscopy positioning techniques. Flux penetration into a high T-c YBa2Cu3O7-delta thin film has been observed in real time at 85 K with single vortex resolution. Flux is seen to enter the film in the form of vortex bundles as well as single flux quanta, Phi(0). (C) 1996 American Institute of Physics.
Subject Keywords
FORCE MICROSCOPY
URI
https://hdl.handle.net/11511/38181
Journal
APPLIED PHYSICS LETTERS
DOI
https://doi.org/10.1063/1.117582
Collections
Department of Physics, Article