Cluster multipole dynamics in noncollinear antiferromagnets
Takuya Nomoto, Ryotaro Arita
Abstract
In this paper, the authors study spin dynamics in the noncollinear antiferromagnet Mn3Sn. They derive an effective low-energy model based on the cluster multipole expansion of the magnetic structure and show that the cluster multipole degrees of freedom dominate its low-energy dynamics. They also show that Mn3Sn has a high domain wall velocity without a Walker breakdown and a stable uniform precession mode with a tunable frequency.
Topics & Concepts
Multipole expansionPhysicsCluster (spacecraft)PrecessionDynamics (music)AntiferromagnetismDegrees of freedom (physics and chemistry)Spin (aerodynamics)Condensed matter physicsDomain (mathematical analysis)Work (physics)FerromagnetismSpin modelMode (computer interface)Magnetic structureSpin structureFast multipole methodDomain wall (magnetism)Magnetic fieldMagnetic momentMagnetic properties of thin filmsZnO doping and propertiesPhysics of Superconductivity and Magnetism