Room temperature skyrmions at zero field in exchange bias ultrathin films - Archive ouverte HAL Access content directly
Journal Articles Physical Review Applied Year : 2020

Room temperature skyrmions at zero field in exchange bias ultrathin films

Philippe David
  • Function : Author
  • PersonId : 949424
Gilles Gaudin
Vincent Jacques
  • Function : Author
  • PersonId : 739150
  • IdHAL : vjacques
Olivier Boulle

Abstract

We demonstrate that magnetic skyrmions with diameters around 60 nm can be stabilized at room temperature and zero external magnetic field in an exchange-biased Pt/Co/NiFe/IrMn multilayer stack. This is achieved through an advanced optimization of the multilayer stack composition in order to balance the different magnetic energies controlling the skyrmion size. Magnetic imaging is performed both with magnetic force microscopy and scanning Nitrogen-Vacancy magnetometry, the latter providing unambiguous measurements at zero external magnetic field. In such samples, we show that exchange bias provides an immunity of the skyrmion spin texture to moderate external magnetic field, in the tens of mT range, which is an important feature for applications as memory devices. These results establish exchange-biased multilayer stacks as a promising platform towards the effective realization of memory and logic devices based on magnetic skyrmions.
Fichier principal
Vignette du fichier
PhysRevD.95.pdf (7.47 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02428517 , version 1 (08-06-2021)

Identifiers

Cite

K. Gaurav Rana, A. Finco, F. Fabre, S. Chouaieb, A. Haykal, et al.. Room temperature skyrmions at zero field in exchange bias ultrathin films. Physical Review Applied, 2020, 13 (4), pp.044079. ⟨10.1103/PhysRevApplied.13.044079⟩. ⟨hal-02428517⟩
261 View
20 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More