Stochastic<i>vs.</i>deterministic magnetic coding in designed cylindrical nanowires for 3D magnetic networks

Bran, Cristina; Saugar, Elias; Fernández-Roldán, José Ángel; Real, R. P. del; Asenjo, A.; Aballe, Lucía; Foerster, Michael; Rodríguez, A. Fraile; Palmero, Ester M.; Vázquez, M.; Chubykalo‐Fesenko, O.

doi:10.1039/d1nr02337c

Cited by 7 publications

(4 citation statements)

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“…As dimensions get comparable to fundamental magnetic length scales, magnetic configurations and magnetization reversal become surprisingly unusual in the emerging nontrivial magnetic structures, such as anomalous Bloch-point domain walls, complex spin texture with chirality, vortices, and skyrmions. [1][2][3][4] Magnetic anisotropy plays a key role in configuring the spatial distribution of magnetic moment. The magnetic anisotropy in the 3D bulk generally displays a specific easy-axis of magnetization by induced magnetic anisotropy under stress or magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A perfect conical nanoshape meets large magnetocrystalline anisotropy: unusual magnetic configurations

Jiang¹,

Wang²,

Fu³

et al. 2023

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

A perfect conical nanoshape meets large magnetocrystalline anisotropy: unusual magnetic configurations

Jiang¹,

Wang²,

Fu³

et al. 2023

J. Mater. Chem. C

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“…The excellent response of cylindrical magnetic nanowires (NWs) to external stimuli (magnetic, electrical, or mechanical), coupled with their interesting static and dynamic magnetic properties, arises from their high aspect ratio and curved geometry [1]. As such, cylindrical NWs are promising three-dimensional (3D) building blocks for a range of diverse fields [2], including biomedical applications [3,4], spin-based nanoelectronics [5,6], and neuromorphic devices [7,8]. An in-depth understanding of the magnetic states in these nanostructures is thus essential for the implementation of cylindrical nanowires in new 3D technologies.…”

Section: Introductionmentioning

confidence: 99%

Distinguishing Local Demagnetization Contribution to the Magnetization Process in Multisegmented Nanowires

et al. 2022

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Cylindrical magnetic nanowires are promising materials that have the potential to be used in a wide range of applications. The versatility of these nanostructures is based on the tunability of their magnetic properties, which is achieved by appropriately selecting their composition and morphology. In addition, stochastic behavior has attracted attention in the development of neuromorphic devices relying on probabilistic magnetization switching. Here, we present a study of the magnetization reversal process in multisegmented CoNi/Cu nanowires. Nonstandard 2D magnetic maps, recorded under an in-plane magnetic field, produce datasets that correlate with magnetoresistance measurements and micromagnetic simulations. From this process, the contribution of the individual segments to the demagnetization process can be distinguished. The results show that the magnetization reversal in these nanowires does not occur through a single Barkhausen jump, but rather by multistep switching, as individual CoNi segments in the NW undergo a magnetization reversal. The existence of vortex states is confirmed by their footprint in the magnetoresistance and 2D MFM maps. In addition, the stochasticity of the magnetization reversal is analysed. On the one hand, we observe different switching fields among the segments due to a slight variation in geometrical parameters or magnetic anisotropy. On the other hand, the stochasticity is observed in a series of repetitions of the magnetization reversal processes for the same NW under the same conditions.

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“…[ 21 ] Bran et al also utilized cylindrical nanowires to control the remnant 3D complex vortex configuration. [ 22 ] Unlike previous works, cylindrical nanowires used in this study are multiple layers of magnetic and nonmagnetic materials. Writing the desired multivortex states on the multilayered nanowires demonstrated potential for the future 3D information storage device.…”

Section: Introductionmentioning

confidence: 99%

Modified Spin Textures in a 3D Magnetic Lattice

Myint

2022

Physica Rapid Research Ltrs

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New magnetic behavior of a 3D magnetic lattice created by stacking hour‐glass structures over a 2D antidot matrix is reported. The unique multivortices induced reversal process along the hard axis is reported for the 3D magnetic lattice. Further analysis with 3D Object Orientated MicroMagnetic Framework (OOMMF) simulation shows this magnetic behavior due to the magnetic coupling between the two building blocks: hour‐glass structures and 2D antidot. The reversal process for the 3D magnetic lattice along the easy axis shows abrupt coherent switching behavior, while the multivortices induced reversal process is observed for the hard axis. A new method of comparing the simulation and experimental result using a MATLAB divergence computation software is also reported. Good agreement between micromagnetic simulation and experimental results is observed via this method.

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Stochasticvs.deterministic magnetic coding in designed cylindrical nanowires for 3D magnetic networks

Abstract: Advances in cylindrical nanowires for 3D information technologies profit from intrinsic curvature that introduces significant differences with regards to planar systems. A model is proposed to control the stochastic and...

Cited by 7 publications

References 50 publications

A perfect conical nanoshape meets large magnetocrystalline anisotropy: unusual magnetic configurations

A perfect conical nanoshape meets large magnetocrystalline anisotropy: unusual magnetic configurations

Distinguishing Local Demagnetization Contribution to the Magnetization Process in Multisegmented Nanowires

Modified Spin Textures in a 3D Magnetic Lattice

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