CPP-GMR performance of electrodeposited metallic multilayered nanowires with a wide range of aspect ratios

Saeki, Ryusei; Mizoguchi, S.; Kamimura, Himeyo; Hayashida, Masamitsu; Ohgai, Takeshi

doi:10.1016/j.jmmm.2021.167849

Cited by 8 publications

(5 citation statements)

References 41 publications

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“…The method also complements currently known processes for modulating the shape and micrometer-scale geometric features of NW template-assisted electrochemical growth in three dimensions. Overall, this method can be adapted for many of the NW growth variations based on the usual continuous electrode approach, like diameter modulation in anodic aluminum oxide membranes, 56 multilayered NWs, 57 and interconnected NWs, 58 to produce novel 3D modulated NW arrays.…”

Section: Resultsmentioning

confidence: 99%

Control of the asymmetric growth of nanowire arrays with gradient profiles

2021

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Section: Resultsmentioning

confidence: 99%

Control of the asymmetric growth of nanowire arrays with gradient profiles

2021

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“…As artificially structured materials, multilayered NWs comprising magnetic layers separated by nonmagnetic layers have offered promising practical applications in 3D spintronic and giant magnetoresistance (GMR) devices [ [113][114][115], outperforming their single element counterparts. To fabricate the alternate layers of these structures using the AAO template-based ED process, dual and single electrochemical cells have been employed [116][117][118].…”

Section: Paed Of Multilayered Nws In Mild and Hard Anodized Aao Templ...mentioning

confidence: 99%

Template-based electrodeposited nonmagnetic and magnetic metal nanowire arrays as building blocks of future nanoscale applications

Kashi¹,

Montazer²

2022

J. Phys. D: Appl. Phys.

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Realizing promising materials for use in next-generation devices at the nanoscale is of enormous importance from both fundamental and applied perspectives. Nonmagnetic and magnetic metal nanowire (NW) arrays fabricated by template-based electrodeposition (ED) techniques have long been considered as good candidates for this purpose. In this review, we focus on the fabrication techniques and characterizations of electrochemically deposited NWs with single, binary, ternary and multilayered component structures mostly carried out in our group. Particular attention is paid to the crystalline and magnetic characteristics (coercivity, squareness, magnetic phase, interactions and magnetization reversal modes) of NW arrays embedded in mild and hard anodized anodic aluminum oxide (AAO) templates with different pore diameters. The pulsed alternating current ED technique is proposed as a versatile approach in high-efficiency filling of the AAO templates, while also allowing for tuning magnetic properties of the resultant NWs. The first-order reversal curve analysis is also highlighted as an advanced characterization tool for nanomagnet arrays. Finally, potential cutting-edge nanoscale applications (magnetic information storage, energy storage and conversion, electronics, biosensing, microwave absorption and giant magnetoresistance) of magnetic NWs are presented.

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“…Most researchers have attempted to refine the pore diameter of AAO templates to obtain ferromagnetic nanowires with a small diameter, which can improve the hard magnetic performance [31][32][33][34][35][36]. If the pore diameter of AAO templates is smaller than several tens of nanometers, it will be quite difficult to realize a uniform pore-filling with electrodeposited metallic crystals due to the limitation of metal ion transportation inside the narrow channels.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial Magnetization and Electrocatalytic Performance for Hydrogen Evolution on Electrodeposited Ni Nanowire Array Electrodes with Ultra-High Aspect Ratio

Sako,

Saeki,

Hayashida

et al. 2024

Nanomaterials

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Ni nanowire array electrodes with an extremely large surface area were made through an electrochemical reduction process utilizing an anodized alumina template with a pore length of 320 µm, pore diameter of 100 nm, and pore aspect ratio of 3200. The electrodeposited Ni nanowire arrays were preferentially oriented in the (111) plane regardless of the deposition potential and exhibited uniaxial magnetic anisotropy with easy magnetization in the axial direction. With respect to the magnetic properties, the squareness and coercivity of the electrodeposited Ni nanowire arrays improved up to 0.8 and 550 Oe, respectively. It was also confirmed that the magnetization reversal was suppressed by increasing the aspect ratio and the hard magnetic performance was improved. The electrocatalytic performance for hydrogen evolution on the electrodeposited Ni nanowire arrays was also investigated and the hydrogen overvoltage was reduced down to ~0.1 V, which was almost 0.2 V lower than that on the electrodeposited Ni films. Additionally, the current density for hydrogen evolution at −1.0 V and −1.5 V vs. Ag/AgCl increased up to approximately −580 A/m2 and −891 A/m2, respectively, due to the extremely large surface area of the electrodeposited Ni nanowire arrays.

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CPP-GMR performance of electrodeposited metallic multilayered nanowires with a wide range of aspect ratios

Cited by 8 publications

References 41 publications

Control of the asymmetric growth of nanowire arrays with gradient profiles

Control of the asymmetric growth of nanowire arrays with gradient profiles

Template-based electrodeposited nonmagnetic and magnetic metal nanowire arrays as building blocks of future nanoscale applications

Uniaxial Magnetization and Electrocatalytic Performance for Hydrogen Evolution on Electrodeposited Ni Nanowire Array Electrodes with Ultra-High Aspect Ratio

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