Electrical detection and nucleation of a magnetic skyrmion in a magnetic tunnel junction observed via $operando$ magnetic microscopy - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2023

Electrical detection and nucleation of a magnetic skyrmion in a magnetic tunnel junction observed via $operando$ magnetic microscopy

Bruno Fernandez
  • Fonction : Auteur
Gilles Gaudin

Résumé

Magnetic skyrmions are topological spin textures which are envisioned as nanometre scale information carriers in magnetic memory and logic devices. The recent demonstration of room temperature stabilization of skyrmions and their current induced manipulation in industry compatible ultrathin films were first steps towards the realisation of such devices. However, important challenges remain regarding the electrical detection and the low-power nucleation of skyrmions, which are required for the read and write operations. Here, we demonstrate, using operando magnetic microscopy experiments, the electrical detection of a single magnetic skyrmion in a magnetic tunnel junction (MTJ) and its nucleation and annihilation by gate voltage via voltage control of magnetic anisotropy. The nucleated skyrmion can be further manipulated by both gate voltage and external magnetic field, leading to tunable intermediate resistance states. Our results unambiguously demonstrate the readout and voltage controlled write operations in a single MTJ device, which is a major milestone for low power skyrmion based technologies.
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Dates et versions

hal-04220466 , version 1 (27-09-2023)

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J. Urrestarazu Larrañaga, Naveen Sisodia, van Tuong Pham, Ilaria Di Manici, Aurélien Masseboeuf, et al.. Electrical detection and nucleation of a magnetic skyrmion in a magnetic tunnel junction observed via $operando$ magnetic microscopy. 2023. ⟨hal-04220466⟩
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