Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2022

Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination

(1) , (1) , (1) , (1) , (1) , (1) , (2) , (2) , (2) , (2) , , , , , , , , , , , (3) , (1) , (1) , , , (1) , (1) , (1)
1
2
3
Brice Sarpi
  • Function : Author
Nicolas Mille
Stefan Stanescu
Rachid Belkhou
  • Function : Author
  • PersonId : 848599
Mohamad-Assaad Mawass
Nina Novakovic-Marinkovic
Florian Kronast
Markus Weigand
Joachim Gräfe
Sebastian Wintz
  • Function : Author
Simone Finizio
Jörg Raabe
Lucia Aballe
Michael Foerster
  • Function : Author
Justin M Shaw
  • Function : Author
Hans T Nembach
  • Function : Author
Laurent Ranno
Gilles Gaudin
Olivier Boulle

Abstract

Magnetic skyrmions are topological spin textures that hold great promise as nanoscale information carriers in non-volatile memory and logic devices. While room-temperature magnetic skyrmions and their current-induced motion were recently demonstrated, the stray field resulting from their finite magnetisation and their topological charge limit their minimum size and reliable motion. Antiferromagnetic skyrmions allow to lift these limitations owing to their vanishing magnetisation and net zero topological charge, promising ultra-small and ultra-fast skyrmions. Here, we report on the observation of isolated skyrmions in compensated synthetic antiferromagnets at zero field and room temperature using X-ray magnetic microscopy. Micromagnetic simulations and an analytical model confirm the chiral antiferromagnetic nature of these skyrmions and allow the identification of the physical mechanisms controlling their size and stability. Finally, we demonstrate the nucleation of synthetic antiferromagnetic skyrmions via local current injection and ultra-fast laser excitation.

Dates and versions

hal-03752807 , version 1 (17-08-2022)

Identifiers

Cite

Roméo Juge, Naveen Sisodia, Joseba Urrestarazu Larrañaga, Qiang Zhang, Van Tuong Pham, et al.. Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination. Nature Communications, 2022, 13 (1), pp.4807. ⟨10.1038/s41467-022-32525-4⟩. ⟨hal-03752807⟩
13 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More