Inertial domain wall characterization in layered multisublattice antiferromagnets

0560082 - FZÚ 2023 RIV NL eng J - Journal Article
Rama-Eiroa, R. - Roy, P.E. - González, J. M. - Guslienko, K.Y. - Wunderlich, Joerg - Otxoa, R.M.
Inertial domain wall characterization in layered multisublattice antiferromagnets.
Journal of Magnetism and Magnetic Materials. Roč. 560, Oct. (2022), č. článku 169566. ISSN 0304-8853. E-ISSN 1873-4766
Institutional support: RVO:68378271
Keywords : domain wall * antiferromagnets * spin-orbit coupling * special relativity * magnetization dynamics
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.7, year: 2022
Method of publishing: Open access

The motion of a Néel-like domain wall induced by a time-dependent staggered spin–orbit field in the layered collinear antiferromagnet MnAu is explored. Through an effective version of the two sublattice nonlinear -model which does not take into account the antiferromagnetic exchange interaction directed along the tetragonal c-axis, it is possible to replicate accurately the relativistic and inertial traces intrinsic to the magnetic texture dynamics obtained through atomistic spin dynamics simulations for quasistatic processes. In the case in which the steady-state magnetic soliton motion is extinguished due to the abrupt shutdown of the external stimulus, its stored relativistic exchange energy is transformed into a complex translational mobility, being the rigid domain wall profile approximation no longer suitable. Although it is not feasible to carry out a detailed follow-up of its temporal evolution in this case, it is possible to predict the inertial-based distance travelled by the domain wall in relation to its steady-state relativistic mass. This exhaustive dynamical characterization for different time-dependent regimes of the driving force is of potential interest in antiferromagnetic domain wall-based device applications.
Permanent Link: https://hdl.handle.net/11104/0339298