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 Néel field. Based on this formalism, we predict an orientation switch mechanism for antiferromagnetic domain walls which can be tested with the recently discovered Néel spin orbit torques.

Spin texture motion in antiferromagnetic and ferromagnetic nanowires / Rodrigues, Davi R.; Everschor-Sitte, Karin; Tretiakov, Oleg A.; Sinova, Jairo; Abanov, Ar.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - STAMPA. - 95:17(2017). [10.1103/PhysRevB.95.174408]

Spin texture motion in antiferromagnetic and ferromagnetic nanowires

Rodrigues, Davi R.;
2017-01-01

Abstract

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 Néel field. Based on this formalism, we predict an orientation switch mechanism for antiferromagnetic domain walls which can be tested with the recently discovered Néel spin orbit torques.
2017
Spin texture motion in antiferromagnetic and ferromagnetic nanowires / Rodrigues, Davi R.; Everschor-Sitte, Karin; Tretiakov, Oleg A.; Sinova, Jairo; Abanov, Ar.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - STAMPA. - 95:17(2017). [10.1103/PhysRevB.95.174408]
File in questo prodotto:
File Dimensione Formato  
2017_Spin_texture_motion_in_antiferromagnetic_pdfeditoriale.pdf

accesso aperto

Tipologia: Versione editoriale
Licenza: Tutti i diritti riservati
Dimensione 515.29 kB
Formato Adobe PDF
515.29 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/265118
Citazioni
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 14
social impact