Microscopic magnetic squeezer

Helseth, L. E.; Fischer, T. M.; Hansen, R. W.; Johansen, T. H.
September 2004
Applied Physics Letters;9/27/2004, Vol. 85 Issue 13, p2556
Academic Journal
A microscopic magnetic squeezer based oil two magnetic domain walls moving along a one-dimensional potential well generated by a stress line in ferrite garnet films is demonstrated. The squeezer can operate on magnetic objects of size 1–200 μm and exert compressive forces up to 10 pN. The squeezer operation, i.e., the relative motion of the two domain walls, is well controlled by a small external magnetic field modulation. The squeezer has potential applications in microfluidics and also as sensitive pressure gauges for microbiological systems.


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