University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Thursday, October 15th 2015
3:35 pm:
Physics and Astronomy Colloquium in 230 STSS/Bruininks Hall
Speaker: Oleg Tchernyshyov, Johns Hopkins University
Subject: Mechanics of magnetic solitons
Refreshments to be served outside 230 SSTS after the colloquium.

Magnets host a variety of solitons that are stable for topological reasons: domain walls, vortices, and skyrmions, to name a few. Because of their stability, topological solitons can potentially be used for storing and processing information. This motivates us to build economic, yet realistic models of soliton dynamics in magnets. E.g., a domain wall in a cylindrical ferromagnetic wire can be pictured as a bead on a string, which can move along the string and rotate about its axis. Its mechanics is counterintuitive: it rotates if pushed and moves if twisted. I will review basic models of ferro- and antiferromagnetic domain walls in one dimension and discuss examples from higher dimensions, e.g., vortices and skyrmions.

Faculty Host: Natalia Perkins

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