Dresden 2017 – wissenschaftliches Programm
MA 37.11: Vortrag
Mittwoch, 22. März 2017, 12:15–12:30, HSZ 401
Mesoscale Dzyaloshinskii-Moriya interaction — •Oleksii Volkov1,2, Denis Sheka3, Denys Makarov1, Jürgen Faßbender1, Volodymyr Kravchuk2, and Yuri Gaididei2 — 1Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden, Germany — 2Bogolyubov Institute for Theoretical Physics, Kyiv, Ukraine — 3Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
A broken chiral symmetry in a magnetic system can lead to the appearance of both periodical and localized magnetization structures. The spin-orbit driven Dzyaloshinskii-Moriya interaction (DMI), which is intrinsic to the crystal, is the origin of all those magnetic textures . Recently, we reported [2,3] that geometrically broken symmetry in curvilinear magnetic systems also leads to the appearance of shape-induced effective DMI.
The combined intrinsic and shape-induced DMI can be reffered to as a mesoscale DMI, whose symmetry and strength depend on the geometrical and material parameters. The mesoscale DMI determines chiral properties of curved systems. We derive the general expression for the mesoscopic DMI terms and determined the conditions for periodical magnetisation structures to appear in one-dimensional ferromagnetic helix wires.
 A. Soumyanarayanan et. al., Nature 539, 509-517 (2016).
 Y. Gaididei et. al, Phys. Rev. Lett. 112, 257203 (2014).
 D. D. Sheka et. al., J. Phys. A: Math. Theor. 48, 125202 (2015).