Extended exchange interactions stabilize long-period magnetic structures in Cr${}_{1/3}$NbS${}_2$

Abstract

The topologically-protected, chiral soliton lattice is a unique state of matter offering intriguing functionality and it may serve as a robust platform for storing and transporting information in future spintronics devices. While the monoaxial chiral magnet Cr${}_{1/3}$NbS${}_2$ is known to host this exotic state in an applied magnetic field, its detailed microscopic origin has remained a matter of debate. Here we work towards addressing this open question by measuring the spin wave spectrum of Cr${}_{1/3}$NbS${}_2$ over the entire Brillouin zone with inelastic neutron scattering. The well-defined spin wave modes allow us to determine the values of several microscopic interactions for this system. The experimental data is well-explained by a Heisenberg Hamiltonian with exchange constants up to third nearest neighbor and an easy plane magnetocrystalline anisotropy term. Our work shows that both the second and third nearest neighbor exchange interactions contribute to the formation of the helimagnetic and chiral soliton lattice states in this robust three-dimensional magnet.

arXiv commentAccepted by Applied Physics Letters

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Cited by in corpus (6)

• Canted antiferromagnetic order in the monoaxial chiral magnets V${}_{1/3}$TaS${}_2$ and V${}_{1/3}$NbS${}_2$
• The nature of ferromagnetism in the chiral helimagnet $C{r}_{1/3}Nb{S}_2$
• Comparative Electronic Structures of the Chiral Helimagnets Cr1/3NbS2 and Cr1/3TaS2
• Consequences and control of multi-scale (dis)order in chiral magnetic textures
• Electronic transport and magnetism in the alternating stack of metallic and highly frustrated magnetic layers in Co${}_{1/3}$NbS${}_2$
• Temperature- and field angular-dependent helical spin period characterized by magnetic dynamics in a chiral helimagnet $MnN{b}_3{S}_6$