Road to zero-field antiferromagnetic skyrmions in a frustrated AFM/FM heterostructure
arXiv:2205.04960 · doi:10.1016/j.physleta.2022.128350
Abstract
We demonstrate a mechanism of significant reduction, including complete elimination, of the external magnetic field required for the stabilization of a skyrmion lattice (SkX) phase in a frustrated triangular Heisenberg antiferromagnet (AFM) with the Dzyaloshinskii-Moriya interaction. It is achieved by coupling of such a AFM plane to a reference ferromagnetic (FM) layer, which generates an effective field cooperating with the external magnetic field. If the FM layer shows some axial single-ion anisotropy then the effective field can also be generated in zero external field due to a spontaneous FM long-range ordering. Then a sufficiently large interlayer coupling can fully substitute the external magnetic field and the SkX phase in the AFM layer can be stabilized even in zero external field.
11 pages, 2 figures
References in corpus (4)
- Skyrmions and Anomalous Hall Effect in a Dzyloshinskii-Moriya Spiral Magnet
- Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings
- Spirals and skyrmions in antiferromagnetic triangular lattices
- Stability of skyrmion crystal phase in antiferromagnetic triangular lattice with DMI and single-ion anisotropy