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arXiv · 1508.07665

Skyrmionic magnetization configurations at chiral magnet/ferromagnet heterostructures

Yuki Kawaguchi·Yukio Tanaka·Naoto Nagaosa
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Abstract

We consider magnetization configurations at chiral magnet (CM)/ferromagnet (FM) heterostructures. In the CM, magnetic skyrmions and spin helices emerge due to the Dzyaloshinskii-Moriya interaction, which then penetrate into the adjacent FM. However, because the non-uniform magnetization structures are energetically unfavorable in the FM, the penetrated magnetization structures are deformed, resulting in exotic three-dimensional configurations, such as skyrmion cones, sideways skyrmions, and twisted helices and skyrmions. We discuss the stability of possible magnetization configurations at the CM/FM and CM/FM/CM hybrid structures within the framework of the variational method, and find that various magnetization configurations appear in the ground state, some of which cause nontrivial emergent magnetic field.

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Yuki Kawaguchi, Yukio Tanaka, Naoto Nagaosa. 2015-08-31. Skyrmionic magnetization configurations at chiral magnet/ferromagnet heterostructures. https://doi.org/10.1103/physrevb.93.064416

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