Magnetotransport Measurements of Domain Wall Propagation in Individual Multisegmented Cylindrical Nanowires

Mohammed, Hanan; Vidal, E. Vilanova; Ivanov, Yurii P.; Kosel, Jürgen

doi:10.1109/tmag.2016.2536644

Cited by 23 publications

(39 citation statements)

References 14 publications

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“…These nanopores can be used as templates for forming arrays of standing nanowires or released by a subsequent chemical removal of alumina structure. Furthermore, different metals can be electrodeposited using the same setup, including multisegmented nanowires 15 , by changing the solution and the applied current. Rate deposition would be different for each metal.…”

Section: Discussionmentioning

confidence: 99%

“…Nanowires are novel materials that possess unique properties, mainly due to a high aspect ratio and shape anisotropy , drug delivery 7,8 , and MRI contrast agents 3,9 . Nanowires are also considered ideal for other applications: magnetic force microscopy 10 , giant magnetoresistance 11 , spin transfer torque 12,13 , and data storage devices 14,15 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Patel

Lago-Cachón

Mohammed

et al. 2019

JoVE

Self Cite

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Magnetic nanowires possess unique properties that have attracted the interest of different fields of research, including basic physics, biomedicine, and data storage. We demonstrate a fabrication method for iron (Fe) nanowires via electrochemical deposition into anodic alumina oxide (AAO) templates. The templates are fabricated by anodization of aluminum (Al) discs, and the pore length and diameter are controlled by changing the anodizing conditions. Pores with an average diameter of around 120 nm are created using oxalic acid as the electrolyte. Using this method, cylindrical nanowires are synthesized, which are released by dissolving the alumina using a selective chemical etchant.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Patel

Lago-Cachón

Mohammed

et al. 2019

JoVE

Self Cite

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“…In the former case a DW may by pinned at the interface. This pinning has been tracked under field through AMR (Mohammed et al 2016) and direct imaging (Ivanov et al 2016a) (Fig. 19c), for Co and Ni segments in a wire with diameter 80 nm.…”

Section: Wall Type Stimulusmentioning

confidence: 99%

“…This has been done also for various tubes, such as Ni (Ruffer et al 2012), CoFeB and permalloy (Rüffer et al 2014, Baumgaertl et al 2016. AMR has also been applied to segmented wires alternating cobalt and nickel segments (Mohammed et al 2016;. AMR can be used to track the presence of one or more domain walls between the voltage leads (Ebels et al 2000).…”

Section: Magnetoresistancementioning

confidence: 99%

Magnetic Nanowires and Nanotubes

Staňo

Fruchart

2018

Handbook of Magnetic Materials

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We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By nano we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry (change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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“…Cylindrical nanowires were grown by electrodeposition into Anodic Aluminum Oxide (AAO) templates with pore diameter (ϕ) of approximately 80 nm and inter pore distance of 105 nm. The AAO templates were fabricated using two subsequent anodization processes in oxalic acid solution (see [7] for more details). Segmented Co/Ni nanowires were fabricated by electrodeposition into the AAO templates using two separate solutions.…”

Section: A Fabrication Of Cylindrical Nanowiresmentioning

confidence: 99%

Angular Magnetoresistance of Nanowires with Alternating Cobalt and Nickel Segments

et al. 2017

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Magnetization reversal in segmented Co/Ni nanowires with varying number of segments was studied using angular Magnetoresistance (MR) measurements on isolated nanowires. The MR measurements offer an insight into the pinning of domain walls within the nanowires. Angular MR measurements were performed on nanowires with two and multiple segments by varying the angle between the applied magnetic field and nanowire (-90° ≤ θ ≤ 90°). The angular MR measurements reveal that at lower values of θ the switching fields are nearly identical for the multisegmented and two-segmented nanowires, whereas at higher values of θ, a decrease in the switching field is observed in the case of two segmented nanowires. The two segmented nanowires generally exhibit a single domain wall pinning event, whereas an increased number of pinning events are characteristic of the multisegmented nanowires at higher values of θ. In-situ magnetic force microscopy substantiates reversal by domain wall nucleation and propagation in multisegmented nanowires.

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Magnetotransport Measurements of Domain Wall Propagation in Individual Multisegmented Cylindrical Nanowires

Cited by 23 publications

References 14 publications

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Magnetic Nanowires and Nanotubes

Angular Magnetoresistance of Nanowires with Alternating Cobalt and Nickel Segments

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