Isotropic transmission of magnon spin information without a magnetic field

Haldar, Arabinda; Tian, Chang; Adeyeye, A. O.

doi:10.1126/sciadv.1700638

Cited by 33 publications

(25 citation statements)

References 40 publications

(55 reference statements)

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“…(iv) Finally, unlike photons, magnons propagate in magnetically ordered (magnonic) media only and do not couple parasitically to a non-magnetic surrounding. These advantages favor the development of magnonics toward information transfer and processing, 6,8,9 including quantum information, 10,11 for engineering of spin wave logic devices, [12][13][14] and periodic magnonic bandgap structures. 15,16 Recently, it has been noted that once a FM film is placed on a superconducting (SC) surface, the dispersion law of magnons is modified drastically.…”

Section: Introductionmentioning

confidence: 99%

Modified dispersion law for spin waves coupled to a superconductor

Golovchanskiy

Abramov

Stolyarov

et al. 2018

Journal of Applied Physics

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In this work, we consider dispersion laws of spin waves that propagate in a ferromagnet/superconductor bilayer, specifically in a ferromagnetic film coupled inductively to a superconductor. The coupling is viewed as an interaction of a spin wave in a ferromagnetic film with its mirrored image generated by the superconductor. We show that, in general, the coupling enhances substantially the phase velocity of magnons in in-plane spin wave geometries. In addition, a heavy nonreciprocity of the dispersion law is observed in the magnetostatic surface spin wave geometry where the phase velocity depends on the direction of the wave propagation.

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Section: Introductionmentioning

confidence: 99%

Modified dispersion law for spin waves coupled to a superconductor

Golovchanskiy

Abramov

Stolyarov

et al. 2018

Journal of Applied Physics

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“…To exploit the rich phenomenology of spin waves for integrated optically inspired processing, generating coherent spatially engineered wavefronts and controlling the propagation and interference of multiple spin‐wave beams are crucial. In addition, nonreciprocity, arising from the dipolar interactions, nonreciprocal coupling between spin waves and antennas, and the breaking of the top/bottom symmetry of the ferromagnetic films, represents an additional degree of freedom for the realization of devices.…”

mentioning

confidence: 99%

“…[6] On the other hand, spin waves offer the potential for nanoscale integrability and provide an interesting physical system for developing unconventional computational frameworks, such as neural networks and reservoir computing. [7] To exploit the rich phenomenology of spin waves [8][9][10][11][12][13][14] for integrated optically inspired processing, generating coherent spatially engineered wavefronts and controlling the propagation and interference of multiple spin-wave beams are crucial. In addition, nonreciprocity, arising from the dipolar interactions, [15][16][17][18] nonreciprocal coupling between spin waves and antennas, [12] and the breaking of the top/ bottom symmetry of the ferromagnetic films, [19] represents an additional degree of freedom for the realization of devices.One of the most versatile methods for spin-wave emission is based on using patterned shaped microantennas, for generating a localized oscillating magnetic field in correspondence Integrated optically inspired wave-based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition.…”

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confidence: 99%

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

et al. 2020

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Integrated optically inspired wave‐based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition. In this view, spin waves represent a promising route due to their nanoscale wavelength in the gigahertz frequency range and rich phenomenology. Here, a versatile, optically inspired platform using spin waves is realized, demonstrating the wavefront engineering, focusing, and robust interference of spin waves with nanoscale wavelength. In particular, magnonic nanoantennas based on tailored spin textures are used for launching spatially shaped coherent wavefronts, diffraction‐limited spin‐wave beams, and generating robust multi‐beam interference patterns, which spatially extend for several times the spin‐wave wavelength. Furthermore, it is shown that intriguing features, such as resilience to back reflection, naturally arise from the spin‐wave nonreciprocity in synthetic antiferromagnets, preserving the high quality of the interference patterns from spurious counterpropagating modes. This work represents a fundamental step toward the realization of nanoscale optically inspired devices based on spin waves.

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“…In planar conduits, these issues can be avoided when the magnetization is perpendicular to the plane since the inplane spin-wave properties are in this case isotropic. 318 While the use of forward volume spin waves in such a configuration is clearly advantageous with more flexible device design options, 164 the implementation is hampered by the lack of magnetic materials with simultaneous strong perpendicular anisotropy and low damping. In thin waveguides, the demagnetization field (see Sec.…”

Section: A Spin-wave Conduitsmentioning

confidence: 99%

Introduction to Spin Wave Computing

Mahmoud¹,

Ciubotaru²,

Vanderveken³

et al. 2021

Preprint

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This paper provides a tutorial overview over recent vigorous efforts to develop computing systems based on spin waves instead of charges and voltages. Spin-wave computing can be considered as a subfield of spintronics, which uses magnetic excitations for computation and memory applications. The tutorial combines backgrounds in spin-wave and device physics as well as circuit engineering to create synergies between the physics and electrical engineering communities to advance the field towards practical spin-wave circuits. After an introduction to magnetic interactions and spin-wave physics, all relevant basic aspects of spin-wave computing and individual spin-wave devices are reviewed. The focus is on spin-wave majority gates as they are the most prominently pursued device concept. Subsequently, we discuss the current status and the challenges to combine spin-wave gates and obtain circuits and ultimately computing systems, considering essential aspects such as gate interconnection, logic level restoration, input-output consistency, and fan-out achievement. We argue that spin-wave circuits need to be embedded in conventional CMOS circuits to obtain complete functional hybrid computing systems. The state of the art of benchmarking such hybrid spin-wave--CMOS systems is reviewed and the current challenges to realize such systems are discussed. The benchmark indicates that hybrid spin-wave--CMOS systems promise ultralow-power operation and may ultimately outperform conventional CMOS circuits in terms of the power-delay-area product. Current challenges to achieve this goal include low-power signal restoration in spin-wave circuits as well as efficient spin-wave transducers.

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Isotropic transmission of magnon spin information without a magnetic field

Abstract: A novel route for data processing is designed based on magnons where waves carry information unlike charges in electronics.

Cited by 33 publications

References 40 publications

Modified dispersion law for spin waves coupled to a superconductor

Modified dispersion law for spin waves coupled to a superconductor

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

Introduction to Spin Wave Computing

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