Magnetoresistance of Nanowires Electrodeposited into Anodized Aluminum Oxide Nanochannels

Ohgai, Takeshi

doi:10.5772/52606

Cited by 12 publications

(11 citation statements)

References 48 publications

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“…Generally speaking, to control the composition of Co-Ni nanowires, the deposition may be performed in a single electrolyte containing Co and Ni ions [1,2,8,9,11,12,[15][16][17][18][19][20][21]. Another way to control the deposition, which is less common, is to perform the deposition in alternating electrolytes containing either Co or Ni [4,6,22].…”

Section: Introductionmentioning

confidence: 99%

“…Another way to control the deposition, which is less common, is to perform the deposition in alternating electrolytes containing either Co or Ni [4,6,22]. Unlike the deposition in two electrolytes, the deposition in a single electrolyte results in an alloy whose composition can be modified by adjusting the electrolyte concentration [1,2,8,9,11,12,[15][16][17][18][19][20][21]. This method allows for a better control of the composition by managing the deposition protocol (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Potential Controlled Co-Ni Nanowires with Compositional Gradient

Tepes¹,

Vrânceanu²,

Cotruț³

et al. 2016

ARA 40th Congress Proceedings

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Co-Ni nanowires with composition gradient were grown by template assisted electrochemical deposition. Using PCTE membrane to grow nanowires makes the deposition of an alloy inside the pores more challenging because the growth is affected by the transport of the electroactive ions into the pores. A novel step-wise deposition-stripping strategy was used to grow NWs with controlled composition along the length of nanowire while maintaining constant the electrolyte composition. A detailed electrochemical analysis was performed to understand and control the Co stripping process, and to demonstrate the applicability of the proposed method. Redox reactions allow us to create custom deposition-stripping programs that enable us to better select and control the potential used to grow the nanowires of controlled composition. Samples were analyzed using scanning electron microscopy (SEM) and EDS. Quantitative analysis performed on samples has revealed that the designed stripping technique and selected potentials resulted in Co-Ni nanowires with up to 3 times more Ni then the samples obtained from similar electrolyte.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential Controlled Co-Ni Nanowires with Compositional Gradient

Tepes¹,

Vrânceanu²,

Cotruț³

et al. 2016

ARA 40th Congress Proceedings

View full text Add to dashboard Cite

show abstract

“…In this case, the idea is to electrically connect nanowires both extremity, which is facilitated by the electrode already present at the nanowires' bottom, used for their electrodeposition. Even if the barrier layer thinning method can be used to obtain an electrical contact [44], removing completely the barrier layer and closing the pores with a thick conductive film (usually Au) is preferred to lower the resistance. The top contact may be fabricated by filling the remaining pores length by a metallic material, like Cu [41,43], or by mechanically polishing the top of the template before depositing an electrode by sputtering [40,42].…”

Section: Nanowires Embedded In Arraymentioning

confidence: 99%

How to Characterize Cylindrical Magnetic Nanowires

Béron¹,

Santos²,

deCarvalho³

et al. 2016

Magnetic Materials

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Cylindrical magnetic nanowires made through the help of nanoporous alumina templates are being fabricated and characterized since the beginning of 2000. They are still actively investigated nowadays, mainly due to their various promising applications, ranging from high-density magnetic recording to high-frequency devices, passing by sensors, and biomedical applications. They also represent suitable systems in order to study the dimensionality effects on a given material. With time, the development in fabrication techniques allowed to increase the obtained nanowire complexity (controlled crystallinity, modulated composition and/or geometry, range of materials, etc.), while the improvements in nanomanipulation permitted to fabricate system based either on arrays or on single nanowires. On the other side, their increased complexity requires specific physical characterization methods, due to their particular features such as high anisotropy, small magnetic volume, dipolar interaction field between them, and interesting electronic properties. The aim of this chapter was to offer an ample overview of the magnetic, electric, and physical characterization techniques that are suitable for cylindrical magnetic nanowire investigation, of what is the specific care that one needs to take into account and which information will be extracted, with typical and varied examples.

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“…One-dimensional nanowires with large aspect ratio have received much attention due to unique shape anisotropy and extremely large surface area [1,2]. The characteristic magnetic properties of magnetic nanowires can be controlled by choice of material and dimensions [3].…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistance of Electrodeposited Co/Cu Multilayer Nanowires

Avcu

Atalay

et al. 2015

Acta Phys. Pol. A

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Co/Cu multilayer nanowires were electrodeposited potentiostatically on highly ordered porous anodic alumina oxide templates. Scanning electron microscopy (SEM) showed that wires have diameters of about 250300 nm and length of 4050 µm. Co/Cu multilayer nanowire arrays embedded in anodic alumina oxide were mechanically polished with diamond in a suspension of oil until the wires appeared. Then the top and bottom surfaces of the material were coated with a layer of Au with a thickness of 100 nm for electrical contacts. Magnetic eld was applied by an electromagnet and resistance was measured by four point technique.

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Magnetoresistance of Nanowires Electrodeposited into Anodized Aluminum Oxide Nanochannels

Cited by 12 publications

References 48 publications

Potential Controlled Co-Ni Nanowires with Compositional Gradient

Potential Controlled Co-Ni Nanowires with Compositional Gradient

How to Characterize Cylindrical Magnetic Nanowires

Magnetoresistance of Electrodeposited Co/Cu Multilayer Nanowires

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