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

Creation of Localized Skyrmion Bubbles in Co/Pt Bilayers using a Spin Valve Nanopillar