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SUMMARY:'Characteristics of mesoscopic ferromagnetic rings in magnetic fie
 lds and their potential use in phase contrast electron-microscopy'- Gerard
  Higgins - Speaker to be confirmed
DTSTART:20120502T140000Z
DTEND:20120502T150000Z
UID:TALK38045@talks.cam.ac.uk
CONTACT:Kimberly Cole
DESCRIPTION:Flux-closed vortex states of mesoscopic rings can be used to i
 ntroduce a phase difference between electrons passing through the ring and
  those passing outside it\, by the Aharonov-Bohm effect. Thus they are can
 didates for use as phase plates in transmission electron-microscopy. The s
 tability of the vortex state is of critical importance. Micromagnetic simu
 lations have been carried out using OOMMF on rings with different shapes (
 circular and D-shaped)\, magnetic anisotropies (including grains)\, widths
 \, diameters\, thicknesses and cellsizes.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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