期刊
PHYSICAL REVIEW MATERIALS
卷 2, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.2.044404
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资金
- University of California Multicampus Research Programs and Initiatives (MRPI) [MRP-17-454963]
We report the observation of room-temperature magnetic skyrmions in Pt/Co/Os/Pt thin-film heterostructures and their response to electric currents. The magnetic properties are extremely sensitive to inserting thin Os layers between the Co-Pt interface, resulting in reduced saturation magnetization, magnetic anisotropy, and Curie temperature. The observed skyrmions exist in a narrow temperature, applied-field and layer-thickness range near the spin-reorientation transition from perpendicular to in-plane magnetic anisotropy. The skyrmions have an average diameter of 2.3 mu m and transport measurements demonstrate these features can be displaced by means of spin-orbit torques with current densities as low as J = 2 x 10(8) A/m(2) and display a skyrmion Hall effect.
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