论文标题
在准二维BA9FE3SE15中，由磁性驱动的铁电性
Ferroelectricity driven by magnetism in quasi-one-dimensional Ba9Fe3Se15
论文作者
论文摘要
自旋诱导的准自旋链系统中的自旋诱导的铁电性鲜为人知，这可能与三维（3D）系统中的旋转链链系统可能有根本不同。在这里，我们报告了由倾斜的螺旋旋转顺序及其在自旋链复合BA9FE3SE15中驱动的铁电性。发现自旋诱导的极化已经发生，并且在TN = 14 K处表现出远高于远程自旋顺序（LRSO）的磁电耦合行为。偏振实体的生长，其动态响应随温度降低而逐渐减慢，并渗透到TNN处的3D小铁电气。我们的结果表明，脱钩链中的短距离旋转顺序（SRSO）在此维度降低的系统中对外来动态起着关键作用。 BA9FE3SE15是迄今为止由于SRSO的形成而在LRSO温度上表现出电力极化的唯一例子。
The spin-induced ferroelectricity in quasi-1D spin chain system is little known, which could be fundamentally different from those in three-dimensional (3D) system. Here, we report the ferroelectricity driven by a tilted screw spin order and its exotic dynamic in the spin-chain compound Ba9Fe3Se15. It is found that the spin-induced polarization has already occurred and exhibits magnetoelectric coupling behavior far above the long-range spin order (LRSO) at TN = 14 K. The polarized entities grow and their dynamic responses slow down gradually with decreasing temperature and permeate the whole lattice to form 3D ferroelectricity at TN. Our results reveal that the short-range spin orders (SRSOs) in the decoupled chains play a key role for the exotic dynamic in this dimension reduced system. Ba9Fe3Se15 is the only example so far which exhibits electric polarization above LRSO temperature because of the formation of SRSOs.
