Switchable electric polarization and ferroelectric domains in a metal-organic-framework
Switchable electric polarization and ferroelectric domains in a metal-organic-framework
复制标题
DOI：
10.1038/npjquantmats.2016.12
复制
发表时间：
2016-09-30
影响因子：
5.7
通讯作者：
Zapf, Vivien S.
中科院分区：
文献类型：
--
作者：
Jain, Prashant;Stroppa, Alessandro;Zapf, Vivien S.
多铁性有序共存和耦合的多铁性材料和磁电材料是一种具有新技术发展前景的材料。虽然大多数研究都集中在无机材料的单相或异质结构上，但最近提出了一类称为金属-有机框架（MOFs）的新材料作为候选材料，展示了多铁性和磁电耦合的有趣新途径。在此，我们报告的起源（CH 3）（2）NH2Mn（HCOO）（3）通过直接观察铁电畴使用二次谐波产生技术。这是第一次，我们观察到这些域是如何组织的（尺寸在微米范围内），以及它们是如何通过施加电场和磁场相互影响的。计算提供了一个估计的电极化，并深入了解其微观起源。
Multiferroics and magnetoelectrics with coexisting and coupled multiple ferroic orders are materials promising new technological advances. While most studies have focused on single-phase or heterostructures of inorganic materials, a new class of materials called metal-organic frameworks (MOFs) has been recently proposed as candidate materials demonstrating interesting new routes for multiferroism and magnetoelectric coupling. Herein, we report on the origin of multiferroicity of (CH3)(2)NH2Mn(HCOO)(3) via direct observation of ferroelectric domains using second-harmonic generation techniques. For the first time, we observe how these domains are organized (sized in micrometer range), and how they are mutually affected by applied electric and magnetic fields. Calculations provide an estimate of the electric polarization and give insights into its microscopic origin.