Velamazán J Alberto Rodríguez, Fabelo Óscar, Qureshi Navid
Institut Laue-Langevin, 71, av des Martyrs CS 20156, Grenoble, 38042, France.
Sci Rep. 2024 Dec 28;14(1):31204. doi: 10.1038/s41598-024-82505-5.
The promise of antiferromagnetic spintronics largely relies on the possibilities of electrical manipulation of antiferromagnetic states, which requires the exploration of innovative material platforms to meet the challenge. Erythrosiderite-type compounds constitute a class of non-oxide materials presenting magneto-electric couplings ranging from multiferroicity to linear magneto-electric behaviour. In this communication, we demonstrate that Cs[FeCl(DO)] shows evidence of another ferroic order, ferrotoroidicity, providing an alternative way of manipulating the magnetic states. The magnetic structure of this compound (a collinear antiferromagnet with moments along b) allows a toroidal moment in the ac-plane. We have used spherical neutron polarimetry on a single crystal of Cs[FeCl(DO)] cooled in different configurations of applied electric (E) and magnetic (H) fields to show that the toroidal domains can be selected by a conjugate field (ExH) coupling with the c-component of the toroidal moment. The extraordinary sensitivity of spherical neutron polarimetry allows detecting and quantifying this toroidal domain selection.
反铁磁自旋电子学的前景很大程度上依赖于对反铁磁态进行电操纵的可能性，这需要探索创新的材料平台来应对挑战。赤铁矿型化合物是一类非氧化物材料，呈现出从多铁性到线性磁电行为的磁电耦合。在本通讯中，我们证明Cs[FeCl(DO)]显示出另一种铁性序——铁环性的证据，为操纵磁态提供了一种替代方法。该化合物的磁结构（一种沿b轴具有磁矩的共线反铁磁体）允许在ac平面中存在环形矩。我们对在不同外加电场（E）和磁场（H）配置下冷却的Cs[FeCl(DO)]单晶进行了球形中子极化测量，以表明环形畴可以通过与环形矩的c分量的共轭场（E×H）耦合来选择。球形中子极化测量的非凡灵敏度使得能够检测和量化这种环形畴选择。
