论文标题
三阶参数Bistable磁性多效金属
A three-order-parameter bistable magnetoelectric multiferroic metal
论文作者
论文摘要
使用第一原则计算，我们预测，分层的晶矿金属BI $ _5 $ _5 $ _5 $ _5 $ o $ _ {17} $是一种铁磁性，铁电和铁型，它们可能会意识到长期以来的室友单个型单相化的较大型单相化的目标，这些目标是高度化的大型群体，并构成了强度大量的群体，并将其分别划分。 Bi $ _5 $ Mn $ _5 $ o $ _ {17} $具有两个近乎能量的基础状态，具有相互正交的矢量订单参数（极化，磁化，磁性固醇激素），可以通过在接地状态之间切换在全球范围内旋转。因此，人们期望巨大的交叉偶联磁电和磁性磁效应以及光学非核心。重要的是，BI $ _5 $ MN $ _5 $ o $ _ {17} $在O富裕的增长条件下应在热力学上保持稳定，因此可以在实验上访问。
Using first-principles calculations we predict that the layered-perovskite metal Bi$_5$Mn$_5$O$_{17}$ is a ferromagnet, ferroelectric, and ferrotoroid which may realize the long sought-after goal of a room-temperature ferromagnetic single-phase multiferroic with large, strongly coupled, primary-order polarization and magnetization. Bi$_5$Mn$_5$O$_{17}$ has two nearly energy-degenerate ground states with mutually orthogonal vector order parameters (polarization, magnetization, ferrotoroidicity), which can be rotated globally by switching between ground states. Giant cross-coupling magnetoelectric and magnetotoroidic effects, as well as optical non-reciprocity, are thus expected. Importantly, Bi$_5$Mn$_5$O$_{17}$ should be thermodynamically stable in O-rich growth conditions, and hence experimentally accessible.
