Domain Wall Automotion in Three-Dimensional Magnetic Helical Interconnectors

Skoric, Luka ; Donnelly, Claire ; Hierro-Rodriguez, Aurelio ; Cascales Sandoval, Miguel A. ; Ruiz-Gómez, Sandra ; Foerster, Michael ; Niño, Miguel A. ; Belkhou, Rachid ; Abert, Claas ; Suess, Dieter ; Fernández-Pacheco, Amalio (Universidad de Zaragoza)

Resumen: 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.

Idioma: Inglés

DOI: 10.1021/acsnano.1c10345

Año: 2022

Publicado en: ACS NANO 16 (2022), 8860-8868
ISSN: 1936-0851

Factor impacto JCR: 17.1 (2022)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 12 / 161 = 0.075 (2022) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 12 / 107 = 0.112 (2022) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 12 / 178 = 0.067 (2022) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 20 / 343 = 0.058 (2022) - Q1 - T1

Factor impacto CITESCORE: 25.4 - Engineering (Q1) - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 4.728 - Engineering (miscellaneous) (Q1) - Physics and Astronomy (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/Q-MAD
Financiación: info:eu-repo/grantAgreement/EC/H2020/101001290/EU/3DNANOMAG-Three-dimensional nanoscale magnetic structures
Financiación: info:eu-repo/grantAgreement/EC/H2020/730872/EU/Convenient Access to Light Sources Open to Innovation, Science and to the World/CALIPSOplus
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104604RB/AEI-10.13039-501100011033

Tipo y forma: Article (Published version)

Área (Departamento): Área Física de la Tierra (Dpto. Física Teórica)