Driving skyrmions with low threshold current density in Pt/CoFeB thin film - Laboratoire de Physique des Solides d'Orsay
Journal Articles Physica Scripta Year : 2023

Driving skyrmions with low threshold current density in Pt/CoFeB thin film

Abstract

Abstract Magnetic skyrmions are topologically stable spin swirling particle like entities which are appealing for next generation spintronic devices. The expected low critical current density for the motion of skyrmions makes them potential candidates for future energy efficient electronic devices. Several heavy metal/ferromagnetic (HM/FM) systems have been explored in the past decade to achieve faster skyrmion velocity at low current densities. In this context, we have studied Pt/CoFeB/MgO heterostructures in which skyrmions have been stabilized at room temperature (RT). It has been observed that the shape of the skyrmions are perturbed even by the small stray field arising from low moment magnetic tips while performing the magnetic force microscopy (MFM), indicating presence of low pinning landscape in the samples. This hypothesis is indeed confirmed by the low threshold current density to drive the skyrmions in our sample, at velocities of few ∼10 m s −1 .

Dates and versions

hal-04295768 , version 1 (23-11-2023)

Identifiers

Cite

Brindaban Ojha, Sougata Mallick, Sujit Panigrahy, Minaxi Sharma, André Thiaville, et al.. Driving skyrmions with low threshold current density in Pt/CoFeB thin film. Physica Scripta, 2023, 98 (3), pp.035819. ⟨10.1088/1402-4896/acb862⟩. ⟨hal-04295768⟩
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