Magnonic logic circuits

Khitun, Alexander; Bao, Ming; Wang, Kang L.

doi:10.1088/0022-3727/43/26/264005

Cited by 620 publications

(461 citation statements)

References 51 publications

Supporting

Mentioning

441

Contrasting

Unclassified

Order By: Relevance

“…R ecently, several new concepts were presented that associated with a novel magnonic approach for information transport and processing [1][2][3][4][5][6][7] . Magnons are the spin-wave excitation quanta of magnetic materials.…”

mentioning

confidence: 99%

Realization of a spin-wave multiplexer

et al. 2014

View full text Add to dashboard Cite

Recent developments in the field of spin dynamics-like the interaction of charge and heat currents with magnons, the quasi-particles of spin waves-opens the perspective for novel information processing concepts and potential applications purely based on magnons without the need of charge transport. The challenges related to the realization of advanced concepts are the spin-wave transport in two-dimensional structures and the transfer of existing demonstrators to the micro-or even nanoscale. Here we present the experimental realization of a microstructured spin-wave multiplexer as a fundamental building block of a magnon-based logic. Our concept relies on the generation of local Oersted fields to control the magnetization configuration as well as the spin-wave dispersion relation to steer the spin-wave propagation in a Y-shaped structure. Thus, the present work illustrates unique features of magnonic transport as well as their possible utilization for potential technical applications.

show abstract

mentioning

confidence: 99%

Realization of a spin-wave multiplexer

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Periodic variation of the magnetic material's parameters allows the realization of magnonic crystals with novel properties not found in the unstructured material. For example, the dispersion relation of spin waves can be controlled to achieve new schemes for spin-wave-based computing [1][2][3][4][5][14][15][16][17] . The spin-wave dispersion relation depends on many parameters, such as the geometry of the spin-wave waveguide (film thickness and waveguide width), external magnetic field H ext , and saturation magnetization M S .…”

mentioning

confidence: 99%

Optically reconfigurable magnetic materials

et al. 2015

View full text Add to dashboard Cite

Structuring of materials is the most general approach for controlling waves in solids. As spin waves-eigen-excitations of the electrons' spin system-are free from Joule heating, they are of interest for a range of applications, such as processing 1-5 , filtering 6-8 and short-time data storage 9 . Whereas all these applications rely on predefined constant structures, a dynamic variation of the structures would provide additional, novel applications. Here, we present an approach for producing fully tunable, two-dimensionally structured magnetic materials. Using a laser, we create thermal landscapes in a magnetic medium that result in modulations of the saturation magnetization and in the control of spin-wave characteristics. This method is demonstrated by the realization of fully reconfigurable oneand two-dimensional magnonic crystals-artificial periodic magnetic lattices.There are two general approaches in designing the properties of a material: changing its chemical composition and structuring. Structuring has been used to control mechanical 10 , optical 11 , and even magnetic properties 12,13 . Periodic variation of the magnetic material's parameters allows the realization of magnonic crystals with novel properties not found in the unstructured material. For example, the dispersion relation of spin waves can be controlled to achieve new schemes for spin-wave-based computing [1][2][3][4][5][14][15][16][17] . The spin-wave dispersion relation depends on many parameters, such as the geometry of the spin-wave waveguide (film thickness and waveguide width), external magnetic field H ext , and saturation magnetization M S . In fact, all of these parameters have already been used to fabricate magnonic crystals [6][7][8]12,13,[18][19][20] : arrays of metallic stripes, etched grooves or antidots, biasing magnetic field or periodic variation of the saturation magnetization using ion implantation.However, all available methods for the fabrication of such spintronic devices result in spatially constant magnetic materials. J. Topp et al. have shown that the parameters of magnetic materials can be changed locally after the rather time-consuming fabrication of the spintronic device 21 -but the functionality of the device stays the same. Here, we present an alternative method for structuring and use it for the manipulation of spin waves-namely fully tunable light patterns (computer-generated holograms), in which optically induced thermal patterns/landscapes modify the spinwave dispersion relation and, hence, the propagation. Thus, the proposed optically reconfigurable magnetic material allows the functionality of a magnetic element to be tuned on demand; the same element can be used as a conduit, a logic gate or a data buffering element.The set-up used for the realization of the light patterns consists of a continuous wave laser as light source, an acousto-optical modulator for temporal intensity control, and a spatial light modulator for spatial intensity control (see Fig. 1a). To study the influence of the thermal gradient ...

show abstract

“…1,2 As such, a tremendous amount of research has been devoted in recent years to the development of spin-wave based technology, and many milestones have already been reached, with the realization of spin wave logic gates, [3][4][5] filters, 6 delay lines, 7 and multiplexors, 8 for example. Whilst the design of the aforementioned building blocks of magnonic circuits is indeed very important, it is an open question as to how they could be linked together in parallel, so that the devices could collectively perform increasingly complex computational tasks.…”

mentioning

confidence: 99%

“…The distributions of the projection of the magnetization on to the internal field, across the width of the waveguides, were modelled using micro-magnetic simulations performed with the Object-Oriented Micro-Magnetic Framework (OOMMF). 17,18 We approximated the waveguide as a cuboid of size (600 Â w Â 0.0077) mm 3 with a cell-size of (10 Â 0.05 Â 7.7) lm 3 . One-dimensional periodic boundary conditions 19 were implemented along the waveguide's long axis, and the exchange interaction was neglected (due to the dominance of the Zeeman and demagnetizing energies).…”

mentioning

confidence: 99%

Magnonic beam splitter: The building block of parallel magnonic circuitry

Садовников

Davies

Гришин

et al. 2015

Applied Physics Letters

100

View full text Add to dashboard Cite

We demonstrate a magnonic beam splitter that works by inter-converting magnetostatic surface and backward-volume spin waves propagating in orthogonal sections of a T-shaped yttrium iron garnet structure. The inter-conversion is enabled by the overlap of the surface and volume spin wave bands. This overlap results from the demagnetising field induced along the transversely magnetised section(-s) of the structure and the quantization of the transverse wave number of the propagating spin waves (which are therefore better described as waveguide modes). In agreement with numerical micromagnetic simulations, our Brillouin light scattering imaging experiments reveal that, depending on the frequency, the incident fundamental waveguide magnonic modes may also be converted into higher order waveguide modes. The magnonic beam splitter demonstrated here is an important step towards the development of parallel logic circuitry of magnonics.

show abstract

Magnonic logic circuits

Cited by 620 publications

References 51 publications

Realization of a spin-wave multiplexer

Realization of a spin-wave multiplexer

Optically reconfigurable magnetic materials

Magnonic beam splitter: The building block of parallel magnonic circuitry

Contact Info

Product

Resources

About