Controlled evolution of three-dimensional magnetic states in strongly coupled cylindrical nanowire pairs

Fullerton, J ; Hierro-Rodriguez, A ; Donnelly, C ; Sanz-Hernández, D ; Skoric, L ; MacLaren, D A ; Fernández-Pacheco, A

Resumen: Cylindrical magnetic nanowires are promising systems for the development of three-dimensional spintronic devices. Here, we simulate the evolution of magnetic states during fabrication of strongly-coupled cylindrical nanowires with varying degrees of overlap. By varying the separation between wires, the relative strength of exchange and magnetostatic coupling can be tuned. Hence, we observe the formation of six fundamental states as a function of both inter-wire separation and wire height. In particular, two complex three-dimensional magnetic states, a 3D Landau Pattern and a Helical domain wall, are observed to emerge for intermediate overlap. These two emergent states show complex spin configurations, including a modulated domain wall with both Néel and Bloch character. The competition of magnetic interactions and the parallel growth scheme we follow (growing both wires at the same time) favours the formation of these anti-parallel metastable states. This works shows how the engineering of strongly coupled 3D nanostructures with competing interactions can be used to create complex spin textures.

Idioma: Inglés

DOI: 10.1088/1361-6528/aca9d6

Año: 2023

Publicado en: Nanotechnology 34, 12 (2023), 125301 [11 pp.]
ISSN: 0957-4484

Factor impacto JCR: 2.9 (2023)

Categ. JCR: PHYSICS, APPLIED rank: 68 / 179 = 0.38 (2023) - Q2 - T2
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 87 / 141 = 0.617 (2023) - Q3 - T2
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 221 / 439 = 0.503 (2023) - Q3 - T2

Factor impacto CITESCORE: 7.1 - Mechanical Engineering (Q1) - Electrical and Electronic Engineering (Q1) - Chemistry (all) (Q1) - Mechanics of Materials (Q1) - Materials Science (all) (Q2) - Bioengineering (Q2)

Factor impacto SCIMAGO: 0.631 - Bioengineering (Q2) - Electrical and Electronic Engineering (Q2) - Chemistry (miscellaneous) (Q2) - Nanoscience and Nanotechnology (Q2) - Mechanical Engineering (Q2) - Mechanics of Materials (Q2) - Materials Science (miscellaneous) (Q2)

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/H2020/746958/EU/Perpendicular Magnetic Anisotropy: from Topological Defects to Reconfigurable Magnetic Devices/MAGTOPRECON
Financiación: info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104604RB/AEI-10.13039-501100011033

Tipo y forma: Congress (Published version)