Fast Domain Wall Motion Governed by Topology and Œrsted Fields in Cylindrical Magnetic Nanowires

Schöbitz, Michael; Riz, A. De; Martin, Sylvain; Bochmann, Sebastian; Thirion, C.; Vogel, Jan; Foerster, Michael; Aballe, Lucía; Menteş, Tevfik Onur; Locatelli, Andrea; Genuzio, Francesca; Le-Denmat, S.; Cagnon, Laurent; Toussaint, Jean-Christophe; Gusakova, D.; Bachmann, Julien; Fruchart, Olivier

doi:10.1103/physrevlett.123.217201

Cited by 53 publications

(65 citation statements)

References 45 publications

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“…[ 5–12 ] Indeed, first experimental realizations of cylindrical magnetic nanowires have led to the observation of new domain wall structures containing magnetic singularities, high domain wall velocities, and topological transformations, demonstrating the rich physics that can appear in these higher dimensional magnetic nanostructures. [ 13–15 ]…”

Section: Introductionmentioning

confidence: 99%

Electroless Deposition of Ni–Fe Alloys on Scaffolds for 3D Nanomagnetism

Pip

Donnelly

Döbeli

et al. 2020

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3D magnetic nanostructures are of great interest due to the possibility to design novel properties and the benefits for both technological applications such as high‐density data storage, as well as more fundamental studies. One of the main challenges facing the realization of these three‐dimensional systems is their fabrication, which includes the deposition of magnetic materials on 3D surfaces. In this work, the electroless deposition of Ni–Fe on a 3D‐printed, non‐conductive microstructure is presented. The deposited films exhibit low coercivity, with the saturation magnetization and composition corresponding to the archetypal soft magnetic material permalloy. For fundamental studies of 3D micromagnetism, this new development in fabrication offers the possibility to combine the flexibility of 3D nanofabrication techniques such as two‐photon lithography for the fabrication of 3D scaffolds with a homogeneous soft ferromagnetic thin film, and thus represents an important step toward exploring the rich physics of complex 3D magnetic architectures with tailored properties and the development of advanced applications.

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Section: Introductionmentioning

confidence: 99%

Electroless Deposition of Ni–Fe Alloys on Scaffolds for 3D Nanomagnetism

Pip

Donnelly

Döbeli

et al. 2020

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“…As is often the case, there is not a single best methodology but rather, upon deciding upon a geometry, one should consider the strengths and weaknesses of individual approaches. For example, it is very clear that electrodeposition into anodised alumina or ion track etched templates is very well suited to producing very pure, cylindrical magnetic nanowires, with very smooth sidewalls and there is little doubt that this powerful methodology will continue to be exploited in order to explore the physics of ultrafast domain walls [34] and eventually spin-Cherenkov physics. Recent work has also shown that for the case of anodised alumina templates, more complex connected nanowire structures can be made [89] suggesting that this methodology may also allow the realization of complex 3D nanowire lattices.…”

Section: Discussionmentioning

confidence: 99%

“…Today, 3D Nanomagnetism has come of age [32], providing the potential to host a plethora of new physics including spin textures locked by topological protection [33], ultrafast domain wall motion [34], controlled spin-wave emission [35,36], magnetochiral effects [32] and curvature-driven energies that produce new effective interactions [37][38][39][40]. A thorough investigation of these phenomena now demand new fabrication techniques that enable controlled sub-100 nm growth of magnetic materials in three-dimensions.…”

Section: Introductionmentioning

confidence: 99%

Harnessing Multi-Photon Absorption to Produce Three-Dimensional Magnetic Structures at the Nanoscale

et al. 2020

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Three-dimensional nanostructured magnetic materials have recently been the topic of intense interest since they provide access to a host of new physical phenomena. Examples include new spin textures that exhibit topological protection, magnetochiral effects and novel ultrafast magnetic phenomena such as the spin-Cherenkov effect. Two-photon lithography is a powerful methodology that is capable of realising 3D polymer nanostructures on the scale of 100 nm. Combining this with postprocessing and deposition methodologies allows 3D magnetic nanostructures of arbitrary geometry to be produced. In this article, the physics of two-photon lithography is first detailed, before reviewing the studies to date that have exploited this fabrication route. The article then moves on to consider how non-linear optical techniques and post-processing solutions can be used to realise structures with a feature size below 100 nm, before comparing two-photon lithography with other direct write methodologies and providing a discussion on future developments.

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“…Each segment's magnetization direction reverses either by coherent rotation or by nucleation and propagation of a DW, depending on their composition (e.g., defining its magnetocrystalline anisotropy) and length [111], [204]. This reversal can be driven by magnetic fields [36], [37], electric currents [43], [205] or a combination of both [44] with DWs possibly transforming during motion [206]. In particular, the experiments with cobalt and nickel-based NWs of diameters around 90 nm have resulted in current-induced DW velocities up to 600 m/s [44], [205].…”

Section: A Non-volatile Data Storagementioning

confidence: 99%

“…• Arrays of NWs have been used as electromagnetic pulse detectors [3], microwaves circulators or phase shifters [29]- [32] at 10 -40 GHz frequencies. • When isolated, effects like giant magneto-resistance (GMR) [33]- [35], domain wall (DW) pinning [36]- [38] and spin transfer torque (STT) [39]- [41] are exploited mainly for prospective memory applications [42]- [45] employing nanoseconds (GHz) pulses. 1000 kHz (1 MHz) to the GHz regime.…”

Section: Introductionmentioning

confidence: 99%

Cylindrical Magnetic Nanowires Applications

et al. 2021

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Cylindrical magnetic nanowires feature unique properties, which make them attractive for fundamental research as well as novel applications. These one-dimensional structures introduce a pronounced shape anisotropy that together with material selection can strongly affect the magnetic properties and can be tuned by incorporating segments of different materials or diameters along the length. They attract a large interest in the scientific community, ranging from physicists to material scientists to bioengineers. Consequently, these nanowires are developed for and employed in very diverse applications in medicine, biology, data and energy storage, catalysis or microwave electronics, among others. In this review we investigate the most active emerging applications of cylindrical nanowires grown in alumina templates by electrochemical deposition. This method has several key features, including low cost and a high level of control over the design. A fundamental property that distinguishes those applications is the operating frequency, which we chose to apply as an underlying structure for this review. With this we attempt to provide a wide and organized view of applications based on cylindrical magnetic nanowires with a focus on tailored physical and chemical properties.

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Fast Domain Wall Motion Governed by Topology and Œrsted Fields in Cylindrical Magnetic Nanowires

Cited by 53 publications

References 45 publications

Electroless Deposition of Ni–Fe Alloys on Scaffolds for 3D Nanomagnetism

Electroless Deposition of Ni–Fe Alloys on Scaffolds for 3D Nanomagnetism

Harnessing Multi-Photon Absorption to Produce Three-Dimensional Magnetic Structures at the Nanoscale

Cylindrical Magnetic Nanowires Applications

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