Journal
NANO LETTERS
Volume 16, Issue 3, Pages 1981-1988Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b05257
Keywords
Skyrmion; room temperature; thin films; spin-orbit torque; symmetry breaking
Categories
Funding
- Energy Frontier Research Center for Spins and Heat in Nanoscale Electronic Systems (SHINES)
- National Science Foundation Nanosystems Engineering Research Center for Translational Applications of Nanoscale Multiferroic Systems (TANMS)
- FAME Center, one of six centers of the Semiconductor Technology Advanced Research network (STARnet)
- Semiconductor Research Corporation (SRC) program - Microelectronics Advanced Research Corporation (MARCO)
- Defense Advanced Research Projects Agency (DARPA)
- Direct For Mathematical & Physical Scien [1411085] Funding Source: National Science Foundation
- Division Of Materials Research [1411085] Funding Source: National Science Foundation
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Magnetic skyrmions, which are topologically protected spin textures, are promising candidates for ultralow-energy and ultrahigh-density magnetic data storage and computing applications. To date, most experiments on skyrmions have been carried out at low temperatures. The choice of available materials is limited, and there is a lack of electrical means to control skyrmions in devices. In this Work, we demonstrate a new method for creating a stable skyrmion bubble phase in the CoFeB-MgO material system at room temperature, by engineering the interfacial perpendicular magnetic anisotropy of the ferromagnetic layer. Importantly, we also demonstrate that artificially engineered symmetry breaking gives rise to a force acting on the skyrmions, in addition to the current-induced spin orbit torque, which can be used to drive their motion. This room-temperature creation and manipulation of skyrmions offers new possibilities to engineer skyrmionic devices. The results bring skyrmionic memory and logic concepts closer to realization in industrially relevant and manufacturable thin film material systems.
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