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- W4303649097 abstract "Generation of perpendicular effective magnetic field or perpendicular spins ({sigma}z) is central for the development of energy-efficient, scalable, and external-magnetic-field-free spintronic memory and computing technologies. Here, we report the first identification and the profound impacts of a significant effective perpendicular magnetic field that can arise from asymmetric current spreading within magnetic microstrips and Hall bars. This effective perpendicular magnetic field can exhibit all the three characteristics that have been widely assumed in the literature to signify the presence of a flow of {sigma}z, i.e., external-magnetic-field-free current switching of uniform perpendicular magnetization, a sin2{phi}-dependent contribution in spin-torque ferromagnetic resonance signal of in-plane magnetization ({phi} is the angle of the external magnetic field with respect to the current, and a {phi}-independent but field-dependent contribution in the second harmonic Hall voltage of in-plane magnetization. This finding suggests that it is critical to include current spreading effects in the analyses of various spin polarizations and spin-orbit torques in magnetic heterostructure. Technologically, our results provide perpendicular effective magnetic field induced by asymmetric current spreading as a novel, universally accessible mechanism for efficient, scalable, and external-magnetic-field-free magnetization switching in memory and computing technologies." @default.
- W4303649097 created "2022-10-08" @default.
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- W4303649097 date "2022-10-06" @default.
- W4303649097 modified "2023-09-27" @default.
- W4303649097 title "Current-induced perpendicular effective magnetic field in magnetic heterostructures" @default.
- W4303649097 doi "https://doi.org/10.48550/arxiv.2210.02916" @default.
- W4303649097 hasPublicationYear "2022" @default.
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