Establishing the chiral helimagnetic state in single crystals of Cr1/3TaS2

Noncentrosymmetric systems lack a centre of inversion, which can lead to interesting magnetic phenomena. Cr1/3NbS2, a chiral helimagnet, has been shown to host a chiral soliton lattice, i.e., 360 degree domain walls separated by regions of ferromagnetism, in an external field. Its sister compound, Cr1/3TaS2, has now been found to host a chiral soliton lattice as well, but a chiral helimagnetic state has yet to be confirmed with neutron diffraction. Preliminary neutron diffraction measurements on polycrystalline Cr1/3TaS2 indicate an incommensurate phase is present, which could be the fingerprint of chiral ordering. We propose to use single crystal diffraction measurements of Cr1/3TaS2, as well as the high resolution possible for WISH time of flight measurements, to establish its long range ordering and establish its magnetic propagation vector.