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- W4283523735 abstract "Abstract Spin‐orbit‐torque (SOT) offers a highly attractive perspective for manipulating magnetization dynamics in magnetic nanostructures. SOT is been observed and studied in various systems. However, limited by the efficiency, SOT‐induced switching of the ultrahard ferromagnet is still extremely difficult and a further improvement in efficiency is requested. Here, the SOT is reported in chemically disordered soft Fe 0.5 Pt 0.5 and Pt/Fe 0.5 Pt 0.5 bilayers. Due to the magnetization‐strengthened spin Hall effect, the damping‐like torque efficiency and spin Hall conductivity (SHC) in Fe 0.5 Pt 0.5 reach 1.11 and 1.08 × 10 6 ℏ /2 e Ω −1 m −1 respectively, much higher than those in conventional materials. Furthermore, the Pt/Fe 0.5 Pt 0.5 interface enhances SHC to a total of 2.93 × 10 6 ℏ /2 e Ω −1 m −1 due to the interfacial symmetry breaking. This system can be used to partially switch the magnetization of ultra‐hard exchange‐spring system with a switching field of 1T by applying a relatively low current. This finding will push forward the development of SOT devices with ultrahigh‐density and low‐power consumption." @default.
- W4283523735 created "2022-06-27" @default.
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- W4283523735 date "2022-06-25" @default.
- W4283523735 modified "2023-10-07" @default.
- W4283523735 title "High Spin Hall Conductivity Induced by Ferromagnet and Interface" @default.
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- W4283523735 doi "https://doi.org/10.1002/adfm.202112754" @default.
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