FeCo nanowires deposited in a magnetic field

Han, Gang; Lu, Jiadao; Gao, Youhui

doi:10.1016/j.jmmm.2015.05.065

Cited by 13 publications

(8 citation statements)

References 24 publications

(22 reference statements)

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“…[26,28,31,35,46,52,53,[64][65][66] However, other authors reported that when XRD measurements were done in the BraggÀBrentano mode for Nws shorter than 10 μm after removal of the aluminum substrate and replaced with a metallic film (Au and/or Cu) as work electrode, these films deposited on the backside of the nanoporous alumina template were detected in the diffractograms. [17,49,67,68] For these reasons, we consider that the structural analysis of FeCo Nw arrays in alumina templates on aluminum substrates with lengths shorter than 10 μm must be done in the grazing-incidence X-ray diffraction (GIXRD) mode instead of the XRD BraggÀBrentano mode. In this configuration, the contribution of the substrate (Al) to the main diffraction can lead to an overestimation of the crystallite size.…”

Section: Morphology Composition and Structure Of The Fe 67 Co 33 Nwsmentioning

confidence: 99%

Magnetic Vortex Domain Wall Observation on Polycrystalline Imperfect Iron−Cobalt Alloy Nanowires Growing on 1050 Aluminum

Londoño-Calderón

Londoño

et al. 2021

Physica Status Solidi (a)

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Nanowires (Nws) are 1D nanostructures in which there is a preferential direction of growth-leading to an aspect ratio greater than 10. Due to the quantum confinement effects of the 1D morphology and the large surface to volume ratio, Nws are promising materials for the fabrication of high-performance photodetectors, [1] supercapacitors, [2] fuel cell materials, [3] high-performance photoswitches, [4] and nanophotonics devices. [5] In particular, magnetic Nws are of more technological interest than other magnetic nanostructured materials [6] due to their higher multifunctional properties. For example, magnetic Nws have shown potential in bioengineering, [7] wireless magnetic manipulation, [8] magnetically powered adaptive Nw swimmers, [9] and spintronics. [10] Additional applications involve the design of new nanofabrication [11] and assembly [12] methods for understanding the magnetoresistance, [13] magnetoreactance, [14] and magnetization of individual Nws. [15]

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Section: Morphology Composition and Structure Of The Fe 67 Co 33 Nwsmentioning

confidence: 99%

Magnetic Vortex Domain Wall Observation on Polycrystalline Imperfect Iron−Cobalt Alloy Nanowires Growing on 1050 Aluminum

Londoño-Calderón

Londoño

et al. 2021

Physica Status Solidi (a)

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“…Arrays of nanowires show the perpendicular anisotropy accompanied with larger coercivity stemming from their reduced diameter when compared to the continuous films with similar compositions. Han et al [111] reported the preparation of the Fe-Co nanowires under a magnetic field of 8 kOe, which induced a preferred crystallographic orientation, and affected the magnetic properties of the nanowires. Song et al [112] electrodeposited thin Co-Fe nanowires into AAO templates of 50 nm diameter at different electrolyte temperatures; increasing the temperature resulted in a larger nanowire Co content.…”

Section: Co-ni Co-fe Nanowiresmentioning

confidence: 99%

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Cesiulis

Tsytsaru

Podlaha

et al. 2018

CNANO

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Background: Quasi-one dimensional nanostructures: nanowires, nanotubes, nanorods, nanobelts/nanoribbons and complex "nanowire-nanoparticle" composites have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. Methods:One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition. The fabrication approaches for the growth of iron-group alloy nanostructures inside nanoporous oxide membranes by means of different electrodeposition techniques, and the resulting unique properties and potential applications of this type of materials are reviewed. Results:Arrays of nanostructures can be obtained by filling a porous oxide template that contains a large number of straight cylindrical, nano-sized diameter holes. Generalities of metals electrodeposition into nanoporous oxide membranes are discussed. Measures to minimize the nonuniformity of deposits inside pores need to be addressed to thin the barrier layer, to control hydrogen evolution and to improve mass transport inside the pores. Examples of binary and ternary iron group alloys grown inside nanoporous oxide templates are provided. Catalytic hydrogen evolution and methanol oxidation on the nanowires arrays are described. The "sample size effect" on the magnetic properties of materials and the electrodeposition of multilayered structures necessary for giant magnetoresistance (GMR) are discussed in details. Conclusion:Electrodeposition of binary and ternary iron-group alloys confirm that controlling alloy composition inside nanopores is still a challenge. composites [7] have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition, first reported by Possin [8] in track etched mica films, and expanded upon by others with different materials and templates [2,[9][10][11][12][13][14]. However, the self-organized porous anodic aluminum oxide (AAO) membrane has become one of the most often used templates for tunable synthesis of different nanostructured materials [15,16].

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“…Antara membran yang menjadi pilihan utama para penyelidik adalah membran alumina berliang (AAO) (Han et al 2015;Maleki et al 2015;Schelhas et al 2015;Zhang & Jiao 2015). Ini kerana AAO mempamerkan ciri liang yang tegak, berserenjang dengan permukaan membran, seragam di samping mempunyai kestabilan terma, mekanik dan kimia yang baik.…”

Section: Pengenalanunclassified

Pembentukan Cekung Berkualiti Tinggi Menggunakan Tempoh Penganodan yang Singkat bagi Penghasilan AAO

Saidin

Jumali²,

Kok

et al. 2016

JSM

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The quality of the AAO membrane prepared using two-step anodization technique is strongly influenced by the pre-textured concave indented during the first-step of anodization. This work was conducted to determine the optimum duration of anodization to produce a high quality of concaves. The anodization process was conducted using 0.3 M H 2 C 2 O 4 solution as an electrolyte at 40 V and 18°C applied voltage and temperature, respectively. Anodizing process was performed up to 6 h. The changes of the current during anodization process was recorded. After removal of the resulting oxide layer, the concaves formed were studied using FESEM. FESEM micrograph confirmed the formation of a uniform hexagonal concaves. Beside improving the uniformity, the extension of anodizing duration formed a well-defined arrangement of concaves with minimum defects. This work found that the optimum period to obtain a uniform and perfect concaves is between 4 and 6 h. This is because the extension of anodizing period caused the wall to collapse and creating larger, irregular pores. In addition, the underlying mechanism for concave formation was described in detail.

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FeCo nanowires deposited in a magnetic field

Cited by 13 publications

References 24 publications

Magnetic Vortex Domain Wall Observation on Polycrystalline Imperfect Iron−Cobalt Alloy Nanowires Growing on 1050 Aluminum

Magnetic Vortex Domain Wall Observation on Polycrystalline Imperfect Iron−Cobalt Alloy Nanowires Growing on 1050 Aluminum

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Pembentukan Cekung Berkualiti Tinggi Menggunakan Tempoh Penganodan yang Singkat bagi Penghasilan AAO

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