基于电荷转移的分子基铁电和磁电材料

Molecular ferroelectrics and magnetoelectrics based on charge–transfer

电荷转移行为在分子基材料的自旋双稳态、价态互变等诸多体系中一直发挥着关键作用,基于分子基化合物中电荷转移构筑铁电和磁电材料是近年来新发展的研究方向,并吸引化学、材料及物理研究者们的广泛关注.相对于传统的铁电和磁电材料发生机制,电荷转移引发或诱导的分子铁电和磁电材料,在加快器件运行速度的同时,可以实现局域磁矩的调控,因而通过外场调控有望实现磁电耦合.本文就基于电荷转移引发或诱导的分子基铁电和磁电材料研究体系进行分类,并进行系统性论述.此外,还提出个人观点,对当前领域的发展前景进行展望,希望能够为相关领域的研究者提供一些启示或参考.

The charge-transfer behavior has always played a key role in spin bistability,valence tautomerization and other systems of molecular-based materials.Designing ferroelectric and magnetoelectric materials based on the chargetransfer behavior in molecular-based compounds has become a new research direction in recent years,and has attracted extensive attention from researchers in chemistry,materials,and physics.Compared with the traditional ferroelectric and magnetoelectric generation mechanisms,molecular-based ferroelectrics and magnetoelectrics triggered or induced by the charge-transfer can accelerate the running speed of devices while realizing local magnetic moment regulation.Therefore,magnetoelectric coupling is expected to be realized through external field regulation.In this paper,molecular-based ferroelectric and magnetoelectric materials initiated or induced by the charge-transfer are classified and systematically discussed.In addition,it presents personal opinions and prospects,aiming to provide some useful references for researchers in this area.