Domain wall control in wire-tube nanoelements

Neumann, Rodrigo F.; Bahiana, M.; Vargas, Nicolás M.; Altbir, D.; Allende, S.; Görlitz, Detlef; Nielsch, Kornelius

doi:10.1063/1.4807119

Cited by 20 publications

(10 citation statements)

References 24 publications

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“…While the versatility is lower than with lithography for strips, a large variety of designs has been demonstrated. More exotic routes exist, such as pulsed plating followed by etching [22], or the alternation of wire and tubes [48,45]. The focus of the present work is restricted to the diameter modulation of a plain wire.…”

Section: Types Of Pinning For Nanowiresmentioning

confidence: 99%

Domain wall pinning in a circular cross-section wire with modulated diameter

Riz

Trapp

Fernández-Roldán

et al. 2020

Magnetic Nano- And Microwires

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Section: Types Of Pinning For Nanowiresmentioning

confidence: 99%

Domain wall pinning in a circular cross-section wire with modulated diameter

Riz

Trapp

Fernández-Roldán

et al. 2020

Magnetic Nano- And Microwires

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“…Such wire-tube struc-tures ( Fig. 6f) have been considered mainly in micromagnetic simulations (Neumann et al 2013a;2015, Espejo et al 2015, Salazar-Aravena et al 2013, Salazar-Aravena et al 2014.…”

Section: Wire-tube Nanoelementsmentioning

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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“…A scaling technique [26] was used to reduce the number of interacting atoms that were needed correctly reproduce the magnetic behaviour of the systems. The values of the scaling parameters are the same as in Reference [15]. Based on our current computational facilities, we have designed the downscaled systems to have 6000 < N < 10000 atoms.…”

Section: Computational Modelmentioning

confidence: 99%

“…Such structures consist of two metallic layers separated by an intermediate insulating microlayer. In the same direction, it have been recently proposed hybrid elements composed by wires and tubes [15,16], looking for the possibility of controlling the coercivity by generating a partial pinning of the domain wall at the interface between tube and wire sections. In a previous paper, Neumann et al [15] studied the possibility of controlling the domain wall propagation in order to obtain a three-state magnetic behaviour.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the nucleation of domain walls along multi-segmented cylindrical nanoelements

et al. 2015

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The magnetization reversal of three-segment cylindrical nanoelements comprising of alternating nanowire and nanotube sections is investigated by means of Monte Carlo simulations. Such nanoelements may feature a three-state behaviour with an intermediate plateau in the hysteresis curve due to a metastable pinning of the domain walls at the wire-tube interfaces. It turns out that vortex as well as transverse domain walls contribute to the magnetization reversal. By varying the geometric parameters, the sequence, or the material of the elements the nucleation location of domain walls, as well as their nucleation field, can be tailored. Especially interesting is the novel possibility to drive domain walls coherently in the same or in opposite directions by changing the geometry of the hybrid nanoelement. This important feature adds additional flexibility to the construction of logical devices based on domain wall movement. Another prominent outcome is that domain walls can be nucleated near the centre of the element and then traverse to the outer tips of the cylindrical structure when the applied field is increased, which also opens the possibility to use these three-segment nanoelements for the field induced delivery of domain walls as substitutes for large nucleation pads.

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Domain wall control in wire-tube nanoelements

Cited by 20 publications

References 24 publications

Domain wall pinning in a circular cross-section wire with modulated diameter

Domain wall pinning in a circular cross-section wire with modulated diameter

Magnetic Nanowires and Nanotubes

Tailoring the nucleation of domain walls along multi-segmented cylindrical nanoelements

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