Creation of localized skyrmion bubbles in Co/Pt bilayers using a spin-valve nanopillar

Article

关键词: MAGNETIC SKYRMIONS;    WEAK FERROMAGNETISM;    ANISOTROPY;    DRIVEN;    DYNAMICS;    TORQUE;    FILMS;   

DOI  :  10.1103/PhysRevB.97.184424

来源: SCIE

【 摘 要 】

We fabricate devices in which a magnetic nanopillar spin valve makes contact to a Co/Pt bilayer thin film with perpendicular magnetic anisotropy, to achieve local control of domains in the Co/Pt bilayer underneath the nanopillar. The goal is to develop the ability to nucleate, detect, and annihilate magnetic skyrmions in the Co/Pt using spin-polarized currents from the nanopillar. We demonstrate the ability to distinguish the local behavior of the Co/Pt film beneath the nanopillar from the extended film and show that the two can switch independently of each other. This allows us to isolate a localized domain under the pillar that can be controlled separately from the rest of the Co/Pt film using applied currents and magnetic fields. Micromagnetic simulations indicate that this localized domain has skyrmion symmetry. Our results represent a first step toward controlling room-temperature skyrmions using localized spin-transfer torque.

【 授权许可】

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