At short time scales, the inertia term becomes relevant for the magnetization dynamics of ferromagnets and leads to nutation for the magnetization vector. For the case of spatially extended magnetic systems, for instance, Heisenberg spin chains with the isotropic spin-exchange interaction, this leads to the appearance of a collective excitation, the “nutation wave,” whose properties are elucidated by analytical arguments and numerical studies. The one-particle excitations can be identified as relativistic massive particles. These particles, the “nutatons,” acquire their mass via the Brout–Englert–Higgs mechanism, through the interaction of the wave with an emergent topological gauge field. This spin excitation would appear as a peak in the spectrum of the scattering structure factor in inelastic neutron scattering experiments. The high frequency and speed of the nutation wave can open paths for realizing ultrafast spin dynamics.
Skip Nav Destination
Research Article| September 28 2020
Nutation wave as a platform for ultrafast spin dynamics in ferromagnets
I. Makhfudz ;
E. Olive ;
I. Makhfudz, E. Olive, S. Nicolis; Nutation wave as a platform for ultrafast spin dynamics in ferromagnets. Appl. Phys. Lett. 28 September 2020; 117 (13): 132403. https://doi.org/10.1063/5.0013062
Download citation file:
Don't already have an account? Register
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Could not validate captcha. Please try again.