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  Setting of the magnetic structure of chiral kagome antiferromagnets by a seeded spin-orbit torque

Pal, B., Hazra, B. K., Göbel, B., Jeon, J.-C., Pandeya, A. K., Chakraborty, A., et al. (2022). Setting of the magnetic structure of chiral kagome antiferromagnets by a seeded spin-orbit torque. Science Advances, 8(24): eabo5930. doi:10.1126/sciadv.abo5930.

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Pal, Banabir1, Author           
Hazra, Binoy K.1, Author           
Göbel, Börge2, 3, Author           
Jeon, Jae-Chun1, Author           
Pandeya, Avanindra K.1, 3, Author           
Chakraborty, Anirban1, 3, Author           
Busch, Oliver2, Author
Srivastava, Abhay K.1, 3, Author           
Deniz, Hakan1, Author           
Taylor, James M.1, Author
Meyerheim, Holger4, Author           
Mertig, Ingrid2, Author
Yang, See-Hun1, Author           
Parkin, Stuart S. P.1, Author           
Affiliations:
1Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              
2External Organizations, ou_persistent22              
3International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle (Saale), Germany, ou_3399928              
4Department of Synthetic Materials and Functional Devices (SMFD), Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3316580              

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 Abstract: The current-induced spin-orbit torque switching of ferromagnets has had huge impact in spintronics. However, short spin-diffusion lengths limit the thickness of switchable ferromagnetic layers, thereby limiting their thermal stability. Here, we report a previously unobserved seeded spin-orbit torque (SSOT) by which current can set the magnetic states of even thick layers of the chiral kagome antiferromagnet Mn3Sn. The mechanism involves setting the orientation of the antiferromagnetic domains in a thin region at the interface with spin currents arising from an adjacent heavy metal while also heating the layer above its magnetic ordering temperature. This interface region seeds the resulting spin texture of the entire layer as it cools down and, thereby, overcomes the thickness limitation of conventional spin-orbit torques. SSOT switching in Mn3Sn can be extended beyond chiral antiferromagnets to diverse magnetic systems and provides a path toward the development of highly efficient, high-speed, and thermally stable spintronic devices.

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 Dates: 2022-06-15
 Publication Status: Published online
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 Identifiers: DOI: 10.1126/sciadv.abo5930
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 8 (24) Sequence Number: eabo5930 Start / End Page: - Identifier: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548