2019/07/20 by Daniel Capic, Dmitry A. Garanin, Eugene M. Chudnovsky
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevresearch.1.033011
published as Phys. Rev. Research 1, 033011 (2019) · 7 PR pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1906.09202
arxiv created 2019/07/20 · arxiv updated 2019/10/16
Abstract Theoretical framework is developed that explains biskyrmion lattices observed in non-chiral magnetic films. We study films of finite thickness containing up to 1000×1000×100 spins. Hexatic biskyrmion lattices in a pure 2D exchange model are naturally described by the Weierstrass \wp and ζ elliptic functions. Starting with such a lattice as an initial state we investigate how it evolves towards the minimum-energy state in the presence of perpendicular magnetic anisotropy and dipole-dipole interaction. In accordance with experiments, we find that the final state is a triangular lattice of biskyrmion bubbles containing Bloch lines.