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SUMMARY:Initial New Domain Structures: Statics and Dynamics - Prof. J. M. 
 Gregg\, Queens University\, Belfast
DTSTART:20121121T111500Z
DTEND:20121121T121500Z
UID:TALK40680@talks.cam.ac.uk
CONTACT:Michael Sutherland
DESCRIPTION:Ferroelectrics were discovered in 1922\, but their properties 
 have only been seriously investigated since just before the second world w
 ar. Ferromagnetics\, on the other hand\, were being used in functional dev
 ices (ornate compasses) many centuries BC. With a headstart of several mil
 lenia\, it is not entirely surprising that the extent to which domains are
  understood and can be actively controlled in ferromagnets is significantl
 y beyond that currently evident in ferroelectrics.\n\n	In an attempt to pl
 ay catch up\, interested teams in Queen’s University Belfast and the Uni
 versity of Cambridge have been examining domain structures in meso and nan
 oscale ferroelectrics\, cut directly from high purity bulk single crystals
  using Focused Ion Beam (FIB) milling. This specimen preparation technique
  seems to give particularly clear insight into domain behaviour in constra
 ined geometries.\n\n	In this seminar\, two main areas of the research done
  to date will be described:\n(i)	The mapping and understanding of flux-clo
 sure structures\;\n(ii)	The manner in which heterogeneity in electric fiel
 ds (induced by patterning) can be used to exert control over domain wall i
 njection and motion.\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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