有机金属磁体中的磁致电极化的强度
Magnetically-induced electric polarization in an organo-metallic magnet
摘要：
磁有序和铁电性之间的耦合在许多过渡金属氧化物中得到了广泛的研究。最强的耦合是在所谓的磁致多铁性中获得的，其中铁电性直接来自破坏反转对称性的磁序。然而，很难找到其中发生这些效应的非氧化物基材料。在这里，我们提出了一个研究的二甲基亚砜二氯化铜（CDC），有机金属量子磁体含有$S = 1/2$铜自旋，其中电极化的强度产生的非共线磁序。我们表明，电极化的强度可以切换在一个惊人的滞后的方式。由于CDC中的磁序是由大有机分子介导的，因此我们的研究表明，磁电相互作用可以存在于这类重要的材料中，从而为使用大分子作为构建块来设计磁电和多铁性开辟了道路。此外，我们表明，CDC经历了磁电量子相变，铁电和磁秩序同时出现作为磁场的函数在非常低的温度。
英文摘要：
The coupling between magnetic order and ferroelectricity has been under intense investigation in a wide range of transition-metal oxides. The strongest coupling is obtained in so-called magnetically-induced multiferroics where ferroelectricity arises directly from magnetic order that breaks inversion symmetry. However, it has been difficult to find non-oxide based materials in which these effects occur. Here we present a study of copper dimethyl sulfoxide dichloride (CDC), an organo-metallic quantum magnet containing $S = 1/2$ Cu spins, in which electric polarization arises from non-collinear magnetic order. We show that the electric polarization can be switched in a stunning hysteretic fashion. Because the magnetic order in CDC is mediated by large organic molecules, our study shows that magnetoelectric interactions can exist in this important class of materials, opening the road to designing magnetoelectrics and multiferroics using large molecules as building blocks. Further, we demonstrate that CDC undergoes a magnetoelectric quantum phase transition where both ferroelectric and magnetic order emerge simultaneously as a function of magnetic field at very low temperatures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
