Molecular Ferroelectrics Bring Electric Control to Spintronics (IMAGE)
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Design principle
(a) The fundamental building block consists of magnetic atoms (arrows with circles) and polar molecules with PM, directed from the negative to the positive charge center. (b) Parallel (PP) and antiparallel (AP) PM establish magnetic sublattices related by translation and inversion symmetry, resulting in conventional AFM. (c) Noncollinear (NP) PM configurations connect magnetic sublattices via rotation symmetry, giving rise to AM with finite PS (assumed PS > 0 for clarity). Reversing one PM in the NP configuration (denoted as NP′) flips PS. (d) Schematic illustration of tuning PS through PM, where PM is indicated by the faucet handle, and PS by water drops with red (blue) for spin-up (-down). Twisting PM enables the switching PS on/off and reversing its sign.
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