Research Center for Magnetic and Spintronic Materials

The 233^rd Special CMSM seminar

Materials optimization to form skyrmions and skyrmion lattices

Prof. Eric E. Fullerton Center for Memory and Recording Research, University of California, San Diego

Date & Time: 10:30 - 11:30, July 31^st (Mon), 2017.
Place: Second conference room, 1^st floor, Sengen.

Abstract:

This talk will discuss recent efforts to optimize thin-film materials systems to exhibit skyrmion and skyrmion lattices and to further manipulate the skyrmions with fields and currents. We have observed skyrmion lattices in Fe/Gd multilayer ferrimagnets with perpendicular magnetic anisotropy at room temperature. The chirality of the skyrmions are random indicating they are dipole stabilized as opposed to Dzyaloshinskii-Moriya interactions (DMI) that favors fixed chirality. This allows the formation other chiral structures such as bi-skyrmions and anti-skyrmions. I will further discuss DMI stabilized skyrmions in Pt/Co/Os/Pt thin films that can be controlled by current and exhibit a skyrmion Hall effect.