The Magnetoelectric (ME) effect in solids is a prominent cross correlation phenomenon, in which the electric field (>E) controls the magnetization (>M) and the magnetic field (>H) controls the electric polarization (>P). A rich variety of ME effects and their potential in practical applications have been investigated so far within the transition-metal compounds. Here, we report a possible way to realize the ME effect in organic molecular solids, in which two molecules build a dimer unit aligned on a lattice site. The linear ME effect is predicted in a long-range ordered state of spins and electric dipoles, as well as in a disordered state. One key of the ME effect is a hidden ferroic order of the spin-charge composite object. We provide a new guiding principle of the ME effect in materials without transition-metal elements, which may lead to flexible and lightweight multifunctional materials.
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机译：固体中的磁电（ME）效应是一个显着的互相关现象，其中电场（> E ）控制磁化强度（> M ）和磁场（> > H ）控制电极化（> P ）。到目前为止，已经在过渡金属化合物中研究了多种ME效应及其在实际应用中的潜力。在这里，我们报告了一种在有机分子固体中实现ME效果的可能方法，其中两个分子建立了排列在晶格位置上的二聚体单元。在自旋和电偶极子的长距离有序状态以及无序状态下，可以预测线性ME效应。 ME效应的一个关键是自旋电荷复合物的隐藏铁磁序。我们为不含过渡金属元素的材料提供了ME效应的新指导原则，这可能会导致柔性轻量的多功能材料。
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