Dipolar coupled core-shell perpendicular shape anisotropy MTJ with enhanced write speed and reduced cross-talk - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Applied Année : 2024

Dipolar coupled core-shell perpendicular shape anisotropy MTJ with enhanced write speed and reduced cross-talk

Résumé

The concept of Perpendicular Shape-Anisotropy Spin-Transfer-Torque Magnetic Random-Access Memory tackles the downsize scalability limit of conventional ultrathin magnetic tunnel junctions (MTJ) below sub-20 nm technological nodes. This concept uses a thicker storage layer with a vertical aspect ratio, enhancing the thermal stability factor thanks to the favorable contribution of the shape anisotropy. However, the increased aspect ratio comes with an increase in switching time under applied voltage and the cross-over to non-uniform reversal mechanism at higher aspect ratio, limiting the gain in scalability. Additionally, the larger volume of the magnetic cell significantly increases the stray field acting on the neighboring devices compared to thin MTJs. In this work, we propose the use of a dipolar-coupled core-shell system as a storage layer. This improves both bottlenecks, as predicted by micromagnetic simulations for magnetisation reversal, and a macrospin model to estimate the stray field in a dense array.

Dates et versions

hal-04335929 , version 1 (11-12-2023)

Licence

Paternité

Identifiants

Citer

N. Caçoilo, L. D. Buda-Prejbeanu, B. Dieny, Olivier Fruchart, I.L. Prejbeanu. Dipolar coupled core-shell perpendicular shape anisotropy MTJ with enhanced write speed and reduced cross-talk. Physical Review Applied, 2024, 21, pp.044034. ⟨10.1103/PhysRevApplied.21.044034⟩. ⟨hal-04335929⟩
11 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More