ABSTRACT:
The interplay of local and long-range forces in ferromagnets leads to
the formation of mesoscopic domains with sharp boundaries (domain
walls). The physics changes drastically when the magnet size becomes
smaller than the width of a domain wall. In submicron magnets the
magnetization forms intricate smooth patterns that involve the more
exotic topological defects: integer and fractional vortices,
skyrmions,
merons, and magnetic monopoles. I will describe recent experiments
with
these entities and our attempts to describe their static and dynamic
properties.
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Colloquium Friday, March 30, 2007 4:00 PM Physics Building, Room 204 Note special time. Note special room. |
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