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  Domain Wall Automotion in Three-Dimensional Magnetic Helical Interconnectors

Skoric, L., Donnelly, C., Hierro-Rodriguez, A., Cascales Sandoval, M. A., Ruiz-Gómez, S., Foerster, M., et al. (2022). Domain Wall Automotion in Three-Dimensional Magnetic Helical Interconnectors. ACS Nano, 16(6), 8860-8868. doi:10.1021/acsnano.1c10345.

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 Creators:
Skoric, Luka1, Author
Donnelly, Claire2, Author           
Hierro-Rodriguez, Aurelio1, Author
Cascales Sandoval, Miguel A.1, Author
Ruiz-Gómez, Sandra2, Author           
Foerster, Michael1, Author
Niño, Miguel A.1, Author
Belkhou, Rachid1, Author
Abert, Claas1, Author
Suess, Dieter1, Author
Fernández-Pacheco, Amalio1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Spin3D: Three-Dimensional Magnetic Systems, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_3385536              

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 Abstract: The fundamental limits currently faced by traditional computing devices necessitate the exploration of ways to store, compute, and transmit information going beyond the current CMOS-based technologies. Here, we propose a three-dimensional (3D) magnetic interconnector that exploits geometry-driven automotion of domain walls (DWs), for the transfer of magnetic information between functional magnetic planes. By combining state-of-the-art 3D nanoprinting and standard physical vapor deposition, we prototype 3D helical DW conduits. We observe the automotion of DWs by imaging their magnetic state under different field sequences using X-ray microscopy, observing a robust unidirectional motion of DWs from the bottom to the top of the spirals. From experiments and micromagnetic simulations, we determine that the large thickness gradients present in the structure are the main mechanism for 3D DW automotion. We obtain direct evidence of how this tailorable magnetic energy gradient is imprinted in the devices, and how it competes with pinning effects that are due to local changes in the energy landscape. Our work also predicts how this effect could lead to high DW velocities, reaching the Walker limit during automotion. This work demonstrates a possible mechanism for efficient transfer of magnetic information in three dimensions.

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Language(s): eng - English
 Dates: 2022-05-172022-05-17
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1021/acsnano.1c10345
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Title: ACS Nano
  Other : ACS Nano
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 16 (6) Sequence Number: - Start / End Page: 8860 - 8868 Identifier: ISSN: 1936-0851
CoNE: https://pure.mpg.de/cone/journals/resource/1936-0851