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Helical surface magnetization in nanowires: the role of chirality

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Ruiz Gómez, Sandra and Fernández González, Claudia and Martínez, Eduardo and Raposo, Víctor and Sorrentino, Andrea and Foerster, Michael and Aballe, Lucía and Mascaraque Susunaga, Arantzazu and Ferrer, Salvador and Pérez García, Lucas (2020) Helical surface magnetization in nanowires: the role of chirality. Nanoscale, 12 (34). pp. 17880-17885. ISSN 2040-3364

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Official URL: http://dx.doi.org/10.1039/d0nr05424k


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https://pubs.rsc.org/Publisher


Abstract

Nanomagnetism is nowadays expanding into three dimensions, triggered by the discovery of new magnetic phenomena and their potential use in applications. This shift towards 3D structures should be accompanied by strategies and methodologies to map the tridimensional spin textures associated. We present here a combination of dichroic X-ray transmission microscopy at different angles and micromagnetic simulations allowing to determine the magnetic configuration of cylindrical nanowires. We have applied it to permalloy nanowires with equispaced chemical barriers that can act as pinning sites for domain walls. The magnetization at the core is longitudinal and generates at the surface of the wire helical magnetization. Different types of domain walls are found at the pinning sites, which respond differently to applied fields depending on the relative chirality of the adjacent domains.


Item Type:Article
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© 2020 Royal Society of Chemistry.
This work is supported by the Spanish Ministry of Economy and Competitiveness (MINECO) through projects MAT2017-87072-C4-1-P, MAT2017-87072-C4-2-P and RTI2018-095303-B-C53, the Comunidad de Madrid through Project NANOMAGCOST-CM P2018/NMT-4321 and by Consejeria de Educacion of Castilla y Leon through project SA299P18. IMDEA Nanociencia acknowledges support from the Severo Ochoa Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). SRG acknowledges MINECO for FPI fellowship.

Uncontrolled Keywords:Chemistry; Multidisciplinary; Nanoscience; Nanotechnology; Materials science, Multidisciplinary; Physics applied
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:62744
Deposited On:27 Oct 2020 16:37
Last Modified:27 Oct 2020 16:37

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