Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.

 

Study of the leakage field of magnetic force microscopy thin- film tips using electron holography

(full pdf)

Frost BG, vanHulst NF, Lunedei E, Matteucci G, Rikkers E
APPLIED PHYSICS LETTERS
vol 68 issue 13: p1865-p1867 MAR 25 1996

Electron holography is applied for the study of the leakage field of thin-film ferromagnetic tips used as probes in magnetic force microscopy. We used commercially available pyramidal tips covered o­n o­ne face with a thin NiCo film, which were then placed in a high external magnetic field directed along the pyramid axis. Good agreement between simulated and experimental electron phase difference maps allows to measure the local flux from the ferromagnetic tips and therefore to evaluate the perturbation induced by the microprobe stray field o­n the sample area. (C) 1996 American Institute of Physics.
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