Influence of intersublattice coupling on the terahertz nutation spin dynamics in antiferromagnets

0552513 - FZÚ 2022 RIV US eng J - Journal Article
Mondal, Ritwik - Oppeneer, P.M.
Influence of intersublattice coupling on the terahertz nutation spin dynamics in antiferromagnets.
Physical Review B. Roč. 104, č. 10 (2021), č. článku 104405. ISSN 2469-9950. E-ISSN 2469-9969
Institutional support: RVO:68378271
Keywords : inertial Landau-Lifshitz-Gilbert spin dynamics * ferromagnetic resonance * antiferromagnetic resonance * nutation resonance * antiferromagnetic spintronic
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.908, year: 2021
Method of publishing: Open access

Spin-nutation resonance has been well explored in one-sublattice ferromagnets. Here, we investigate the spin nutation in two-sublattice antiferromagnets as well as, for comparison, ferrimagnets with inter- and intrasub lattice nutation coupling. In particular, we derive the susceptibility of the two-sublattice magnetic system in response to an applied external magnetic field. To this end, the antiferromagnetic and ferrimagnetic (sub-THz) precession and THz nutation resonance frequencies are calculated. Our results show that the precession reso nance frequencies and effective damping decrease with intrasublattic nutation coupling, while they increase with intersublattice nutation in an antiferromagnet.
Permanent Link: http://hdl.handle.net/11104/0327670