Meng, F;
Donnelly, C;
Abert, C;
Skoric, L;
Holmes, S;
Xiao, Z;
Liao, J-W;
... Fernández-Pacheco, A; + view all
(2021)
Non-planar geometrical effects on the magnetoelectrical signal in a three-dimensional nanomagnetic circuit.
ACS Nano
, 15
(4)
pp. 6765-6773.
10.1021/acsnano.0c10272.
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Abstract
Expanding nanomagnetism and spintronics into three dimensions (3D) offers great opportunities for both fundamental and technological studies. However, probing the influence of complex 3D geometries on magnetoelectrical phenomena poses important experimental and theoretical challenges. In this work, we investigate the magnetoelectrical signals of a ferromagnetic 3D nanodevice integrated into a microelectronic circuit using direct-write nanofabrication. Due to the 3D vectorial nature of both electrical current and magnetisation, a complex superposition of several magnetoelectrical effects takes place. By performing electrical measurements under the application of 3D magnetic fields, in combination with macrospin simulations and finite element modelling, we disentangle the superimposed effects, finding how a 3D geometry leads to unusual angular dependences of well-known magnetotransport effects such as the anomalous Hall effect. Crucially, our analysis also reveals a strong role of the noncollinear demagnetising fields intrinsic to 3D nanostructures, which results in an angular dependent magnon magnetoresistance contributing strongly to the total magnetoelectrical signal. These findings are key to the understanding of 3D spintronic systems and underpin further fundamental and device-based studies.
| Type: | Article |
|---|---|
| Title: | Non-planar geometrical effects on the magnetoelectrical signal in a three-dimensional nanomagnetic circuit |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsnano.0c10272 |
| Publisher version: | http://dx.doi.org/10.1021/acsnano.0c10272 |
| Additional information: | Copyright © 2021 The Authors. Published by American Chemical Society. This is an open access article under the CC BY 4.0 license Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Nanostructures, Spintronics, Circuits, Magnetic properties, Mathematical methods |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10130500 |
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