Domain-wall profiles in Co/Irn /Pt(111) ultrathin films: Influence of the Dzyaloshinskii-Moriya interaction

Gy J. Vida, E. Simon, L. Rózsa, K. Palotás, L. Szunyogh

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We perform a study of domain walls in Co/Irn/Pt(111) (n=0,6) films by a combined approach of first-principles calculations and spin-dynamics simulations. We determine the tensorial exchange interactions and the magnetic anisotropies for the Co overlayer in both fcc and hcp geometries, depending on the number of Ir buffer layers. We find strong ferromagnetic nearest-neighbor isotropic exchange interactions between the Co atoms and an out-of-plane magnetic anisotropy for the films in fcc geometry. Our simulations show that the magnetic domain walls are of Néel type, and their rotational sense (chirality) is changed upon the insertion of an Ir buffer layer compared to the pristine Co/Pt(111) system. Our spin-dynamics simulations indicate a twisting of the spins with respect to the planar domain-wall profile on the triangular lattice. We discuss this domain-wall twisting using symmetry arguments and in terms of an appropriate micromagnetic continuum model considering extra energy terms compared to the available literature.

Original languageEnglish
Article number214422
JournalPhysical Review B
Volume94
Issue number21
DOIs
Publication statusPublished - Dec 21 2016

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Ultrathin films
Domain walls
domain wall
Spin dynamics
Magnetic anisotropy
Exchange interactions
twisting
Buffer layers
spin dynamics
profiles
buffers
interactions
Magnetic domains
anisotropy
Geometry
simulation
Chirality
Computer simulation
magnetic domains
geometry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Domain-wall profiles in Co/Irn /Pt(111) ultrathin films : Influence of the Dzyaloshinskii-Moriya interaction. / Vida, Gy J.; Simon, E.; Rózsa, L.; Palotás, K.; Szunyogh, L.

In: Physical Review B, Vol. 94, No. 21, 214422, 21.12.2016.

Research output: Contribution to journalArticle

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