Cylindrical nanowire arrays: From advanced fabrication to static and microwave magnetic properties

Vázquez, M.

doi:10.1016/j.jmmm.2021.168634

Cited by 18 publications

(5 citation statements)

References 110 publications

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“…At such frequencies, the resistivity of the material becomes a critical parameter influencing the onset of eddy currents, which tend to reduce the effective sample volume and permeability. One method to avoid the detrimental effects of eddy currents is connected to the use of samples with a very small crosssection [2] arranged in an array geometry, but a generalized approach to obtain arrays of magnetic materials with nm size, high resistivity, high saturation and high anisotropy field leading to the desired microwave properties is not available yet [3][4][5] (expand reference list numbers).…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic simulation of electrochemically deposited Co nanowire arrays for wideband microwave applications

Pasquale,

Trabada,

Olivetti

et al. 2023

J. Phys. D: Appl. Phys.

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We study the magnetic properties of arrays of Co nanowires which exhibit zero bias-field FMR absorptions in a 0-30 GHz range. Columnar arrays of Co nanowires with lengths of 8-15 µm were electrochemically grown using ~20 µm thick anodic alumina membranes with 50 nm pore diameters. Microstructural, static magnetic, and microwave properties of five different nanowire arrays were characterized. The studied Co nanowires present different crystal structure textures and magnetic properties. The static magnetic loop shapes and the ferromagnetic resonance frequencies of the nanowire arrays were correctly reproduced using the Mumax3 micromagnetic software. For each sample input parameters dependent on the XRD and microstructural data,were fine-tuned to allow the best fit of the experimental hysteresis loops and the related microwave spectra. Using this method, it was possible to analyze the rather complex interplay between geometry and magneto-structural features of the different arrays, defining which parameters play a key role in the development of nano-systems with specific microwave properties. Keywords: magnetic properties, Co nanowire arrays, FMR, microwave

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Section: Introductionmentioning

confidence: 99%

Micromagnetic simulation of electrochemically deposited Co nanowire arrays for wideband microwave applications

Pasquale,

Trabada,

Olivetti

et al. 2023

J. Phys. D: Appl. Phys.

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“…Ferromagnetic nanowires with tunable magnetic properties have been the focus of intense research efforts, not only because they raise interesting fundamental physics questions but also because of their technological relevance. 1,2 For example, they can be used for ultra-high density magnetic recording, 3 in magnetic field sensors or in random-access memories exploiting the giant magnetoresistance observed in the case of multilayered nanowires. [4][5][6][7] Recently, ferromagnetic nanowires have attracted interest in curvature-induced topologically protected magnetization textures, 8,9 as well as prototype structures for 3D information storage.…”

Section: Introductionmentioning

confidence: 99%

Magnetic structure and internal field nuclear magnetic resonance of cobalt nanowires

Scholzen

Lang

Andreev

et al. 2022

Phys. Chem. Chem. Phys.

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“…One significant advantage of magnetic nanowires, compared to other proposed magnetic nanostructures for serving as artificial neurons, is the availability of expertise in growing self-organized arrays of cylindrical ferromagnetic nanowires using templates [39,40]. Such AN arrays would also facilitate large areal density, interconnections between ANs, and input (output) communication.…”

Section: Discussionmentioning

confidence: 99%

Artificial Neuron Based on the Bloch-Point Domain Wall in Ferromagnetic Nanowires

Sánchez,

Caso,

Aliev

2024

Materials

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Nanomagnetism and spintronics are currently active areas of research, with one of the main goals being the creation of low-energy-consuming magnetic memories based on nanomagnet switching. These types of devices could also be implemented in neuromorphic computing by crafting artificial neurons (ANs) that emulate the characteristics of biological neurons through the implementation of neuron models such as the widely used leaky integrate-and-fire (LIF) with a refractory period. In this study, we have carried out numerical simulations of a 120 nm diameter, 250 nm length ferromagnetic nanowire (NW) with the aim of exploring the design of an artificial neuron based on the creation and destruction of a Bloch-point domain wall. To replicate signal integration, we applied pulsed trains of spin currents to the opposite faces of the ferromagnetic NW. These pulsed currents (previously studied only in the continuous form) are responsible for inducing transitions between the stable single vortex (SV) state and the metastable Bloch point domain wall (BP-DW) state. To ensure the system exhibits leak and refractory properties, the NW was placed in a homogeneous magnetic field of the order of mT in the axial direction. The suggested configuration fulfills the requirements and characteristics of a biological neuron, potentially leading to the future creation of artificial neural networks (ANNs) based on reversible changes in the topology of magnetic NWs.

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Cylindrical nanowire arrays: From advanced fabrication to static and microwave magnetic properties

Cited by 18 publications

References 110 publications

Micromagnetic simulation of electrochemically deposited Co nanowire arrays for wideband microwave applications

Micromagnetic simulation of electrochemically deposited Co nanowire arrays for wideband microwave applications

Magnetic structure and internal field nuclear magnetic resonance of cobalt nanowires

Artificial Neuron Based on the Bloch-Point Domain Wall in Ferromagnetic Nanowires

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