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- W4386429275 abstract "Spin-orbit torque (SOT) has been utilized for efficient electrical control of magnetic ordering structure. When discussing the SOT-driven dynamics of magnetic ordering in magnets with collinear spin orientations, the overall magnetic order parameters such as net magnetization and Néel vector are governed by the same law of SOT on individual magnetic moments, and this treatment has been naively extended to the magnets with non-collinear system. Here, we reveal unconventional dynamics of the overall magnetic order parameter of a non-collinear antiferromagnet, i.e., the octupole moment, which is in sharp contrast to those of previously studied collinear systems. Using ac harmonic and dc measurements on a Mn <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</inf> Sn/Pt heterostructure, we reveal that the octupole moment undergoes an opposite rotation with respect to the individual magnetic moments, which stems from the interplay between the SOT and the chiral-spin structure of Mn3Sn. Moreover, we quantify the SOT efficiency in the heterostructure. Our study provides a guideline for understanding the electrical manipulation of non-collinear antiferromagnets, which substantially differs from the well-established collinear systems." @default.
- W4386429275 created "2023-09-05" @default.
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- W4386429275 date "2023-05-01" @default.
- W4386429275 modified "2023-10-01" @default.
- W4386429275 title "Unconventional octupole dynamics of a non-collinear antiferromagnet driven by spin-orbit torque" @default.
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- W4386429275 doi "https://doi.org/10.1109/intermagshortpapers58606.2023.10228250" @default.
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