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Spin-orbit torque (SOT) provides a promising mechanism for electrically encoding information in magnetic states. Unlike existing schemes, where the SOT is passively determined by the material and device structures, an active manipulation of the intrinsic SOT polarity would allow for flexibly programmable SOT devices. Achieving this requires electrical control of the current-induced spin polarization of the spin source. Here we demonstrate a proof-of-concept current-programmed SOT device. Using a noncollinear-antiferromagnetic/nonmagnetic/ferromagnetic Mn3Sn/Mo/CoFeB heterostructure at zero magnetic field, we show current-induced switching in the CoFeB layer due to the spin current polarized by the magnetic structure of the Mn3Sn; by properly tuning the driving current, the spin current from the CoFeB further reverses the magnetic orientation of the Mn3Sn, which determines the polarity of the subsequent switching of the CoFeB. This scheme of mutual
witching can be achieved in a spin-valve-like simple protocol because each magnetic layer serves as a reversible spin source and target magnetic electrode. It yields intriguing proof-of-concept functionalities for unconventional logic and neuromorphic computing.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

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Keyword: spintronics, spin-orbit torque, antiferromagnet

Date published: 2025-02-05

Publisher: Springer Science and Business Media LLC

Journal:

• Nature Communications (ISSN: 20411723) vol. 16 issue. 1 1171

Funding:

• MEXT | Japan Society for the Promotion of Science 22KF0035
• MEXT | Japan Society for the Promotion of Science 24K16999
• MEXT | Japan Society for the Promotion of Science 21J23061
• MEXT | Japan Society for the Promotion of Science 22K14558
• MEXT | Japan Society for the Promotion of Science 19H05622
• MEXT | Japan Society for the Promotion of Science 24H00039
• MEXT | Japan Society for the Promotion of Science 24H02235
• Casio Science Promotion Foundation 39-11
• Casio Science Promotion Foundation 40-4
• Iketani Science and Technology Foundation 0331108-A
• Ministry of Education, Culture, Sports, Science and Technology JPJ011438

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s41467-025-56157-6

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Updated at: 2025-04-08 13:16:19 +0900

Published on MDR: 2025-04-07 22:19:36 +0900