Spin wave propagation in corrugated waveguides

Turčan, Igor; Flajšman, Lukáš; Wojewoda, Ondřej; Roučka, Václav; Man, Ondřej; Urbánek, Michal

doi:10.1063/5.0041138

Cited by 14 publications

(5 citation statements)

References 33 publications

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“…Advanced nanofabrication techniques such as focused electron beam induced deposition allow the preparation of precisely shaped nanometer-sized structures with defined curvatures. Similarly, to the first system, corrugation-induced magnetic anisotropy can stabilize magnetization in narrow magnonic waveguides perpendicularly to their long axis so that the spin waves can propagate at zero external magnetic fields under the most favorable conditions [202] From the two presented material systems, the first one is more suited for rapid prototyping, because the magnonic structures can be written by a focused ion beam at once, in a single fabrication step. The disadvantages are the complicated deposition process of the epitaxial Fe78Ni22 thin film in ultrahigh vacuum conditions and the need to use expensive singlecrystal copper substrates.…”

Section: F Spin-wave Propagation In Materials With Locally Controlled...mentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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Section: F Spin-wave Propagation In Materials With Locally Controlled...mentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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“…[ 122 ] Recently, curvilinear magnetism of nanowires and narribbons put forth a number of concepts for applications in curvilinear magnonics. [ 30 ] This includes spin‐wave transport in a micro‐waveguide, [ 123 ] curvature–induced magnonic crystals, [ 66 ] magnonic waveguides with the designed band gap spectrum, [ 102,124 ] filtering of magnon spectrum based on bounding of spin waves by local bending of magnetic wire, [ 65 ] spin waves propagation over a distance ten times larger in a corrugated waveguide than in planar waveguides, [ 125 ] magnonic logic elements based on the nonreciprocity of the spin‐wave spectrum in ferromagnet helix wires, [ 62 ] geometrically tunable magnon spectrum in antiferromagnetic nanohelices. [ 86 ] Here, we review the theoretical framework of spin wave description in curvilinear nanowires.…”

Section: Magnetization Dynamics In Curvilinear Wiresmentioning

confidence: 99%

Fundamentals of Curvilinear Ferromagnetism: Statics and Dynamics of Geometrically Curved Wires and Narrow Ribbons

Sheka

Pylypovskyi

Volkov

et al. 2022

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quantum-mechanical particles constrained to a curved wire were found to be affected by the geometrical curvature and torsion, which are encoded in the quantum geometrical scalar [1,2] and vector [3,4] potentials. They cause a vast of intriguing phenomena at the nanoscale including topological band structure of electrons bound to periodic minimal surfaces, [5] winding-generated bound states in spirally rolled-up nanotubes, [6] torsion generated confinement of electron by the spin-orbit coupling in a nanoscale helical wire, [3] with some of these effects resulting in a chiral symmetry breaking. [3] Much attention is dedicated also to superconductivity in curved geometries. [7][8][9] Especially for chiral superconductors, where the physical implications of the geometric curvature results in the geometric Josephson effects, geometry-based superconducting quantum interference devices and radiators. [10] Curvilinear and 3D mesoscale systems are actively explored in other disciplines including quantum systems, [3,11] semiconductors (not only fundamental research but also current transistor technologies), [12][13][14] Dirac materials, [15,16] photonics, [17][18][19] and plasmonics [20][21][22] for intra-chip multilevel communication [23] as well as in liquid crystals, [24][25][26] microrobotics, [27][28][29] and magnetism. [30] Curvilinear magnetism encompasses a range of effects of geometrical curvature on magnetic responses of low-dimensional Low-dimensional magnetic architectures including wires and thin films are key enablers of prospective ultrafast and energy efficient memory, logic, and sensor devices relying on spin-orbitronic and magnonic concepts. Curvilinear magnetism emerged as a novel approach in material science, which allows tailoring of the fundamental anisotropic and chiral responses relying on the geometrical curvature of magnetic architectures. Much attention is dedicated to magnetic wires of Möbius, helical, or DNA-like double helical shapes, which act as prototypical objects for the exploration of the fundamentals of curvilinear magnetism. Although there is a bulk number of original publications covering fabrication, characterization, and theory of magnetic wires, there is no comprehensive review of the theoretical framework of how to describe these architectures. Here, theoretical activities on the topic of curvilinear magnetic wires and narrow nanoribbons are summarized, providing a systematic review of the emergent interactions and novel physical effects caused by the curvature. Prospective research directions of curvilinear spintronics and spin-orbitronics are discussed, the fundamental framework for curvilinear magnonics are outlined, and mechanically flexible curvilinear architectures for soft robotics are introduced.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202105219.

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“…The transmission of a SW signal in the out-of-plane direction represents one of the pathways towards increasing the number of computational elements in MNs. The use of orthogonally connected magnetic strips provides a straightforward means to fabricate out-of-plane waveguides within a three-dimensional structure, e.g., meandershaped waveguide [26][27][28][29]. The study of spin-wave transport in periodic YIG meander structures, in the Bragg and Laue geometries, demonstrate the possibility of using the meander structure as a system of coupled resonators that are formed by flat segments of the three-dimensional structure [29].…”

Section: A Variation Of Waveguide Thicknessmentioning

confidence: 99%

“…Recently the concept of using 3D magnonic structures was explored in magnonic crystals fabricated using nanometer-thick meander-shaped Co 40 Fe 40 B 20 [26,27], Ni 80 Fe 20 [28], and YIG [29,30] films consisting of ferromagnetic segments arranged at 90 • angles with respect to each other. Compared to conventional magnonic crystals extending along one axis, such meandering geometries have the advantage of potentially overcoming the limitations of spin-wave manipulation and steering in inplane magnetized films arising from the anisotropic spinwave dispersion, while also allowing for SW propagation in three dimensions without significant losses in the junction region.…”

Section: Introductionmentioning

confidence: 99%

Magnonic Interconnections: Spin-Wave Propagation across Two-Dimensional and Three-Dimensional Junctions between Yttrium Iron Garnet Magnonic Stripes

2022

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Spin-wave transport across multidimensional networks of magnonic waveguides represents a crucial and necessary aspect of prospective densely packed three-dimensional spin-wave architectures. Here, we report the results of investigations of spin-wave propagation through magnonic waveguides extending along and bending across two and three dimensions. We consider three designs of in-plane two-dimensional bends, namely with right-angled, diagonal, and curved geometries. Our numerical and experimental results show that such bends facilitate the conversion of spin-wave types, with the output modal number depending on the spin-wave frequency. At the same time, variation of the width of lateral magnonic bends enables the spin-wave wavelength to be modified. When propagating across three-dimensional waveguide bends in the form of out-of-plane junctions, the spin-wave wavelength can similarly be tuned by adjusting the stripe's thickness. Our results show that magnonic waveguides can serve not only as passive conduits but also as active elements in modifying the properties of the transmitted spin wave in three-dimensional magnonic networks.

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Spin wave propagation in corrugated waveguides

Cited by 14 publications

References 33 publications

Advances in Magnetics Roadmap on Spin-Wave Computing

Advances in Magnetics Roadmap on Spin-Wave Computing

Fundamentals of Curvilinear Ferromagnetism: Statics and Dynamics of Geometrically Curved Wires and Narrow Ribbons

Magnonic Interconnections: Spin-Wave Propagation across Two-Dimensional and Three-Dimensional Junctions between Yttrium Iron Garnet Magnonic Stripes

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