Remagnetization in arrays of ferromagnetic nanostripes with periodic and quasiperiodic order

Szulc, Krzysztof; Lisiecki, Filip; Makarov, Aleksandr; Zelent, Mateusz; Kuświk, Piotr; Głowiński, Hubert; Kłos, Jarosław W.; Münzenberg, Markus; Gieniusz, R.; Dubowik, J.; Stobiecki, F.; Krawczyk, Maciej

doi:10.1103/physrevb.99.064412

Cited by 12 publications

(6 citation statements)

References 51 publications

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“…The concept of controlling spin-wave band gaps and properties by adjusting interactions between the magnetic components is being explored [119][120][121] . In artificial spin ice, this control can be achieved with end canting 115 and by choosing interfaces designed to induce chiralsymmetry-breaking Dzyaloshinskii-Moriya interactions.…”

Section: Fast Dynamicsmentioning

confidence: 99%

Advances in artificial spin ice

et al. 2019

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Artificial spin ices consist of nanomagnets arranged on the sites of various periodic and aperiodic lattices. They have enabled the experimental investigation of a variety of fascinating phenomena such as frustration, emergent magnetic monopoles and phase transitions that have previously been the domain of bulk spin crystals and theory , as we discuss in this Review. Artificial spin ices also show promise as reprogrammable magnonic crystals and, with this in mind, we give an overview of the measurements of fast dynamics in these magnetic metamaterials. We survey the variety of geometries that have been implemented, in terms of both the form of the nanomagnets and the lattices on which they are placed, including quasicrystalline systems and artificial spin systems in 3D. Different magnetic materials can also be incorporated to modify anisotropies and blocking temperatures, for example. With this large variety of systems, the way is open to discover new phenomena, and we complete this Review with possible directions for the future.

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Section: Fast Dynamicsmentioning

confidence: 99%

Advances in artificial spin ice

et al. 2019

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“…The fractal geometry can also be implemented in magnetic systems to modify the magnetic properties, such as the hysteresis loop [16], the magnonic band structure, and the spin-wave localization. Various ferromagnetic structures with crystal geometries have been successfully exploited to engineer different spin-wave band structures [17][18][19][20][21][22][23][24], while the localization of spin waves and self-similarity in the spinwave spectra have been observed in magnonic quasicrystals [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Precessional dynamics of geometrically scaled magnetostatic spin waves in two-dimensional magnonic fractals

et al. 2022

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The control of spin waves in periodic magnetic structures has facilitated the realization of many functional magnonic devices, such as band stop filters and magnonic transistors, where the geometry of the crystal structure plays an important role. Here, we report on the magnetostatic mode formation in an artificial magnetic structure, going beyond the crystal geometry to a fractal structure, where the mode formation is related to the geometric scaling of the fractal structure. Specifically, the precessional dynamics was measured in samples with structures going from simple geometric structures toward a Sierpinski carpet and a Sierpinski triangle. The experimentally observed evolution of the precessional motion could be linked to the progression in the geometric structures that results in a modification of the demagnetizing field. Furthermore, we have found sets of modes at the ferromagnetic resonance frequency that form a scaled spatial distribution following the geometric scaling. Based on this, we have determined the two conditions for such mode formation to occur. One condition is that the associated magnetic boundaries must scale accordingly, and the other condition is that the region where the mode occurs must not coincide with the regions for the edge modes. This established relationship between the fractal geometry and the mode formation in magnetic fractals provides guiding principles for their use in magnonics applications.

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“…This set of parameters corresponds to the ultrathin layer of Pt/Co/Ir 1 , 18 with favorable conditions for the skyrmion stabilization. For Py, we assume the following magnetic parameters: kA/m, pJ/m 40 – 42 . The studied system was discretized uniformly with 0.75 0.75 1.5 nm unit cells to precisely imitate the rounded geometries with high accuracy.…”

Section: Resultsmentioning

confidence: 99%

Stabilization and racetrack application of asymmetric Néel skyrmions in hybrid nanostructures

Zelent,

Moalic,

Mruczkiewicz

et al. 2023

Sci Rep

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Magnetic skyrmions, topological quasiparticles, are small stable magnetic textures that possess intriguing properties and potential for data storage applications. Hybrid nanostructures comprised of skyrmions and soft magnetic material can offer additional advantages for developing skyrmion-based spintronic and magnonic devices. We show that a Néel-type skyrmion confined within a nanodot placed on top of a ferromagnetic in-plane magnetized stripe produces a unique and compelling platform for exploring the mutual coupling between magnetization textures. The skyrmion induces an imprint upon the stripe, which, in turn, asymmetrically squeezes the skyrmion in the dot, increasing their size and the range of skyrmion stability at small values of Dzyaloshinskii–Moriya interaction, as well as introducing skyrmion bi-stability. Finally, by exploiting the properties of the skyrmion in a hybrid system, we demonstrate unlimited skyrmion transport along a racetrack, free of the skyrmion Hall effect.

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Remagnetization in arrays of ferromagnetic nanostripes with periodic and quasiperiodic order

Cited by 12 publications

References 51 publications

Advances in artificial spin ice

Advances in artificial spin ice

Precessional dynamics of geometrically scaled magnetostatic spin waves in two-dimensional magnonic fractals

Stabilization and racetrack application of asymmetric Néel skyrmions in hybrid nanostructures

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