Magnetic structure of monoaxial chiral antiferromagnet Fe_1/3NbS₂ and its implications

The intercalated transition metal dichalcogenide Fe_1/3NbS₂ has recently attracted significant interest due to its demonstrated peculiar coupling between the magnetic and the electronic degrees of freedom, paving the way for novel antiferromagnetic spintronics applications. The basis for understanding this coupling, is the interpretation of the magnetic structure of this material. With this motivation in mind, we have recently collected single crystal neutron diffraction data on Fe_1/3NbS₂ over a large volume of reciprocal space using neutron wavelength-resolved Laue diffraction at the SNS TOPAZ instrument. In this talk, I will discuss these measurements and the results of our magnetic structure determination for Fe_1/3NbS₂ using this data. I will further discuss predictions based on this magnetic structure for a static magnetic Kerr effect, and confirmation of this phenomenon by optical experiments performed at the University of Illinois. Finally, I will discuss the implications of our work for novel transport behaviors in the larger family of intercalated transition metal dichalcogenides.