|Physics Seminar : Hierarchy of domain wall dynamical processes in perpendicularly-magnetized ultrathin films
Magnetic domain patterns form in perpendicularly-magnetized ultrathin films due to the combination of short-range attractive magnetic exchange interactions and long-range repulsive magnetic dipolar interactions. The dynamics of these patterns, and the domains within them, are described by the complicated interplay of different relaxation processes that act across many orders of magnitude in
temporal and spatial length. Our recent measurements of Fe/ 2 ML Ni/W(110) films have permitted the quantitative separation and characterization of these times scales through measurements of the ac magnetic susceptibility. The processes include the motion of existing domain walls, the creation and annihilation of domain walls, and the
transformation between domain wall patterns. The temporal analysis of this hierarchy complements an extensive literature that uses microscopy to characterize the domains spatially.
Professor David Venus, McMaster University, Canada
Rm 2:15, Physics, UWA
: 6488 2738
Tue, 08 Mar 2011 15:45
Tue, 08 Mar 2011 16:45
Gay Hollister <[email protected]>
Tue, 22 Feb 2011 14:24
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