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Mesoscale Dzyaloshinskii-Moriya interaction
Volkov, O.; Sheka, D.; Makarov, D.; Fassbender, J.; Kravchuk, V.; Gaididei, Y.;
A broken chiral symmetry in a magnetic system leads to the appearance of both periodical and localized magnetization structures. Intrinsic to the crystal spin-orbit driven Dzyaloshinskii-Moriya interaction (DMI) is the origin of all those magnetic textures [1]. 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 3D 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.
[1] A. Soumyanarayanan et. al., Nature 539, 509-517 (2016).
[2] Y. Gaididei et. al, Phys. Rev. Lett. 112, 257203 (2014).
[3] D. D. Sheka et. al., J. Phys. A: Math. Theor. 48, 125202 (2015).
Keywords: Dzyaloshinskii-Moriya interaction, curved geometry, helical wire, magnetochirality, mesoscale
  • Lecture (Conference)
    DPG Spring Meeting 2017, 19.-24.03.2017, Dresden, Germany

Publ.-Id: 26760 - Permalink