Spin texture motion in antiferromagnetic and ferromagnetic nanowires

0484641 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Rodrigues, D.R. - Everschor-Sitte, K. - Tretiakov, O.A. - Sinova, Jairo - Abanov, A.
Spin texture motion in antiferromagnetic and ferromagnetic nanowires.
Physical Review B. Roč. 95, č. 17 (2017), s. 1-7, č. článku 174408. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR GB14-37427G
GRANT EU: European Commission(XE) 610115 - SC2
Institucionální podpora: RVO:68378271
Klíčová slova: orbit torques * magnetization * spintronics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.813, rok: 2017

We propose a Hamiltonian dynamics formalism for the current and magnetic field driven dynamics of ferromagnetic and antiferromagnetic domain walls in one-dimensional systems. To demonstrate the power of this formalism, we derive Hamilton equations of motion via Poisson brackets based on the Landau-Lifshitz-Gilbert phenomenology, and add dissipative dynamics via the evolution of the energy. We use this approach to study current induced domain-wall motion and compute the drift velocity. For the antiferromagnetic case, we show that a nonzero magnetic moment is induced in the domain wall, which indicates that an additional application of a magnetic field would influence the antiferromagnetic domain-wall dynamics. We consider both cases of the magnetic field being parallel and transverse to the Neel field. Based on this formalism, we predict an orientation switch mechanism for antiferromagnetic domain walls which can be tested with the recently discovered Neel spin orbit torques.
Trvalý link: http://hdl.handle.net/11104/0279796