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arXiv · 1907.10093

Biskyrmions Lattices in Centrosymmetric Magnetic Films

Daniel Capic·Dmitry A. Garanin·Eugene M. Chudnovsky
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Abstract

Abstract Theoretical framework is developed that explains biskyrmion lattices observed in non-chiral magnetic films. We study films of finite thickness containing up to $1000\times1000\times100$ spins. Hexatic biskyrmion lattices in a pure 2D exchange model are naturally described by the Weierstrass $\wp$ and $\zeta$ 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.

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Daniel Capic, Dmitry A. Garanin, Eugene M. Chudnovsky. 2019-07-20. Biskyrmions Lattices in Centrosymmetric Magnetic Films. https://doi.org/10.1103/physrevresearch.1.033011

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