Control of spin-wave transmission by a programmable domain wall

Hämäläinen, Sampo J.; Madami, M.; Qin, Huajun; Gubbiotti, G.; Dijken, Sebastiaan van

doi:10.1038/s41467-018-07372-x

Cited by 99 publications

(57 citation statements)

References 48 publications

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“…Recently, nanoscale spin textures in magnetic materials have gained attention for their potential as functional elements in spin‐wave devices. In particular, spin‐wave guiding, generation, and tunable transmission were observed at naturally occurring spin textures such as vortices and domain walls.…”

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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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confidence: 99%

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

et al. 2020

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“…Spin waves offer many advantages for wave‐based computing due to their micro‐ to nanometer small wavelengths at gigahertz frequencies, their enormous tunability by various parameters and the possibility of chargeless information transport. One exceptional property utilized in the following work is the anisotropic propagation of spin waves in suitable magnetic media, which can lead to the creation of narrow spin‐wave beams and caustics (see Experimental Section).…”

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confidence: 99%

Experimental Realization of a Passive Gigahertz Frequency‐Division Demultiplexer for Magnonic Logic Networks

Heussner

Talmelli

Geilen

et al. 2020

Physica Rapid Research Ltrs

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The emerging field of magnonics uses spin waves and their quanta, magnons, to implement wave‐based computing on the micro‐ and nanoscale. Multifrequency magnon networks would allow for parallel data processing within single logic elements, whereas this is not the case with conventional transistor‐based electronic logic. However, a lack of experimentally proven solutions to efficiently combine and separate magnons of different frequencies has impeded the intensive use of this concept. Herein, the experimental realization of a spin‐wave demultiplexer enabling frequency‐dependent separation of magnonic signals in the gigahertz range is demonstrated. The device is based on 2D magnon transport in the form of spin‐wave beams in unpatterned magnetic films. The intrinsic frequency dependence of the beam direction is exploited to realize a passive functioning obviating an external control and additional power consumption. This approach paves the way to magnonic multiplexing circuits enabling simultaneous information transport and processing.

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“…In this case, the field is applied along the stripe domains, which initializes head-to-head and tail-to-tail domain walls with a width of about 1.5 μm [27]. As this width is comparable to the width of an a 2 domain, the magnetization in the narrow a 2 domain is nonuniform, which suppresses the measured signal.…”

Section: -4mentioning

confidence: 99%

“…In particular, full imprinting of ferroelastic domain patterns from FE substrates into FM overlayers with in-plane and perpendicular magnetizations and their subsequent manipulation by electric fields have been demonstrated experimentally [11][12][13][14][15][16][17]. FM-FE composites enable electric-field-induced magnetization switching, leading to changes in magnetoresistance [18][19][20][21][22], electrical tuning of ferromagnetic resonances and spin-wave spectra [23][24][25][26], active filtering and routing of propagating spin waves [27,28], and electrical switching between superconducting and normal states [29].…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Magnetization Precession in Individual Magnetoelastic Domains of a Multiferroic Co40Fe40B20/BaTiO

et al. 2020

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Using a magneto-optical pump-probe technique with micrometer spatial resolution, we show that magnetization precession can be launched in individual magnetic domains imprinted in a Co 40 Fe 40 B 20 layer by elastic coupling to ferroelectric domains in a BaTiO 3 substrate. The dependence of the precession parameters on the strength and orientation of the external magnetic field reveals that laser-induced ultrafast partial quenching of the magnetoelastic coupling parameter of Co 40 Fe 40 B 20 by approximately 27% along with 10% ultrafast demagnetization triggers the magnetization precession. The relation between the laser-induced reduction of the magnetoelastic coupling and the demagnetization is approximated by an n(n + 1)/2 law with n ≈ 2. This correspondence confirms the thermal origin of the laser-induced anisotropy change. Based on analysis and modeling of the excited precession, we find signatures of laser-induced precessional switching, which occurs when the magnetic field is applied along the hard magnetization axis and its value is close to the effective magnetoelastic anisotropy field. The precessionexcitation process in an individual magnetoelastic domain is found to be unaffected by neighboring domains. This makes laser-induced changes of magnetoelastic anisotropy a promising tool for driving magnetization dynamics and switching in composite multiferroics with spatial selectivity.

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Control of spin-wave transmission by a programmable domain wall

Cited by 99 publications

References 48 publications

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets

Experimental Realization of a Passive Gigahertz Frequency‐Division Demultiplexer for Magnonic Logic Networks

Laser-Induced Magnetization Precession in Individual Magnetoelastic Domains of a Multiferroic Co40Fe40B20/BaTiO

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