Toward nonlinear magnonics: Intensity-dependent spin-wave switching in insulating side-coupled magnetic stripes

Садовников, А. В.; Odintsov, S. A.; Бегинин, Е. Н.; Шешукова, С. Е.; Sharaevskiĭ, Yu. P.; Никитов, С. А.

doi:10.1103/physrevb.96.144428

Cited by 112 publications

(38 citation statements)

References 72 publications

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“…In view of the different challenges todays CMOS technology is facing, the concept of multiplexing is also very interesting for new approaches of data processing like, for example, the field of magnonics . In this case, spin waves (SW) are used to transport data and the information can be encoded in their amplitude or phase . This approach is especially interesting since wave‐based logic can be realized by utilizing interference effects of the SW as has been shown by, for example, the development of the spin‐wave majority gate and other interferometer‐based devices …”

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confidence: 99%

Frequency‐Division Multiplexing in Magnonic Logic Networks Based on Caustic‐Like Spin‐Wave Beams

Heussner

Nabinger

Fischer

et al. 2018

Physica Rapid Research Ltrs

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Wave-based data processing by spin waves (SW) and their quanta, magnons, is a promising technique to overcome the challenges which CMOS-based logic networks are facing nowadays. The advantage of these quasi-particles lies in their potential for the realization of energy efficient devices on the micro-to nanometer scale due to their charge-less propagation in magnetic materials. In this paper, the frequency dependence of the propagation direction of caustic-like spin-wave beams in microstructured ferromagnets is studied by micromagnetic simulations. Based on the observed alteration of the propagation angle, an approach to spatially combine and separate spinwave signals of different frequencies is demonstrated. The presented magnetic structure constitutes a prototype design of a passive circuit enabling frequency-division multiplexing (FDM) in magnonic logic networks. It is verified that spin-wave signals of different frequencies can be transmitted through the device simultaneously without any interaction or creation of spurious signals. Due to the wave-based approach of computing in magnonic networks, the technique of FDM can be the basis for parallel data processing in single magnonic devices, enabling the multiplication of the data throughput.Multiplexing is a widely used technique of data transmission in telecommunication or computer networks. [1] The common aim of all different realizations of this concept is to transfer multiple data signals through a shared transmission line. [2][3][4][5][6] In view of the different challenges todays CMOS technology is facing, [7] the concept of multiplexing is also very interesting for new approaches of data processing like, for example, the field of magnonics. [8][9][10][11][12][13][14] In this case, spin waves (SW) are used to transport data [15][16][17] and the information can be encoded in their amplitude or phase. [18] This approach is especially interesting since wave-based logic can be realized by utilizing interference effects [19] of the SW as has been shown by, for example, the development of the spin-wave majority gate [20,21] and other interferometer-based devices. [22,23] Aiming at an efficient signal transport in magnonic circuits, spin-wave multiplexers enabling time-division multiplexing have already been experimentally demonstrated. [24,25] In this case, the information carrying spin-wave signals are getting temporally separated, successively transferred through the shared magnonic waveguide and finally allocated to different output waveguides by the spin-wave (de-) multiplexer.In contrast, frequency-division multiplexing (FDM) enables a simultaneous transport of data. [1,26] The bandwidth of the transmission medium is divided into separated frequency channels and the data signals are simultaneously transferred at different frequencies. This approach is heavily used in a broad range of applications, from radio broadcasting and fiber optics to communication satellites. [3][4][5][6] However, since the data handling is realized by transistor-based logic elemen...

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confidence: 99%

Frequency‐Division Multiplexing in Magnonic Logic Networks Based on Caustic‐Like Spin‐Wave Beams

Heussner

Nabinger

Fischer

et al. 2018

Physica Rapid Research Ltrs

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“…The high value of spontaneous polarization and the presence of an extensive spectrum of defects of different nature with localized electrons lead to abnormally large values of the internal electric field strength. Special attention towards semiconductor magnonics is paid in papers [7,8] The defects have a significant effect on many physical properties of a crystal [2,5,9]. LN is a non-stoichiometric phase of variable composition and differs in a wide area of homogeneity on the phase diagram (from 44.5 to 50.5 mol.% Li 2 O at 1460 K) [2,5].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, when exposed to laser radiation, Rayleigh photoinduced light scattering (PILS) occurs on laser-induced static and dynamic (fluctuating) defects with altered refractive index. The value of the electro-optical effect determines the value of the angle of disclosure of the PILS indicatrix, which in the LiNbO 3 crystal occurs predominantly along the polar axis Z in the form of an "eight" or an ellipse [7,20,21]. LN crystal is characterized by the formation of complex defects of various types in addition to point defects of the cation sublattice, described in detail in [3,5,6,[14][15][16][22][23][24][25] LN crystals of any composition grown in an air atmosphere always contain hydroxyl groups (OH − ) in the structure [3,10,26].…”

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Raman Scattering in Non-Stoichiometric Lithium Niobate Crystals with a Low Photorefractive Effect

2019

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Raman spectra of lithium niobate single crystals strongly doped by zinc and magnesium, it has been established, contain low-intense bands with frequencies 209, 230, 298, 694, and 880 cm −1 . Ab ignition calculations fail to attribute these bands to fundamental vibrations of A 2 symmetry type unambiguously. Such vibrations are prohibited by the selection rules in the space group C 3V 6 (R3c).Ab initio calculations also proved that low-intense "extra" bands with frequencies 104 and 119 cm −1 definitely do not correspond to vibrations of A 2 symmetry type. We have paid special attention to these extra bands that appear in LiNbO 3 single crystals Raman spectra despite the fact that they are prohibited by the selection rules. In order to do so, we have studied a number of lithium niobate single crystals, both nominally pure and doped, by Raman spectroscopy. We have assumed that some "extra" bands correspond to two-particle states of acoustic phonons with a total wave vector equal to zero. We have also detected a Zn concentration area (0.05-0.94 mol.% ZnO in a crystal) where doped crystal structure is more ordered: The order of alternation of the main, doping cations, and vacancies along the polar axis is increased, and oxygen octahedra are less distorted.Crystals 2019, 9, 535 2 of 37 changes. Features of the LN crystal structure determine features of its vibrational spectrum and many other physical characteristics. LN single crystal is a material with a widely developed secondary structure. It is important to note that the fine features of its structure and, accordingly, the physical characteristics can be significantly changed by changing the composition (changing the Li/Nb ratio and doping), as well as by changing the structure and physicochemical properties of the melt [3][4][5][6]. Moreover, the oxygen-octahedral structure allows doping of the crystal with high (several wt.%) concentrations of metals, as well as double and triple doping with different elements with different charge states.When interpreting the experimental results, the crystal should be considered as a solid solution of Me:Nb:LiNbO 3 (Me is a doping metal). Many metals are capable of entering the octahedral voids of the structure; the solubility limits of the metals are rather large. The concentration of doping metals in the crystal LN structure can reach several wt. % and accordingly~9 mol.% [2][3][4][5][6]. At the same time, the octahedral coordination of cations by oxygen ions allows significant geometric distortions of octahedra LiO 6 , NbO 6 , MeO 6 , O 6 , ( is a vacant octahedron) without changing their symmetry. This fact, along with a large number of point defects in the cation sublattice, leads to structural and optical ununiformity of LN crystal and to formation of complex ionic complexes and microstructures (clusters) in the main (primary) crystal structure, i.e., to the formation of a widely developed secondary crystal structure [6,[10][11][12][13]. By primary (basic) crystal structure we mean a structure that can be experimentally de...

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“…Magnonics, a young and evolving field, has received extensive research interests in the modern magnetism research community [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Similar to spintronics, which deals with electron spin, magnonics utilizes magnon (the quanta of spin wave) to carry and process information.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

et al. 2019

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Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures. However, the current understanding of spin waves remains quite limited. This review attempts to provide an overview of the anomalous behaviors of spin waves in various types of magnetic materials observed thus far by inelastic light scattering experiments. The anomalously large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed. In addition, the mechanisms of these anomalous behaviors of spin waves are proposed. spectroscopy is applied for studying vibrational properties of materials. However, due to the anomalous behaviors of spin wave scattering comparing with vibrational scattering, Raman spectroscopy study of spin wave is difficult and limited. In this paper, we present a review of anomalous behaviors of spin waves observed by inelastic light scattering experiments, especially by Raman spectroscopy. The large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed, and a proposed model for the mechanisms of spin flip, spin relaxing, and spin wave scattering is presented for understanding these anomalous behaviors of spin waves. In addition, two magnonic crystal structures are proposed for manipulating spin waves through analyses of the abnormal impurity dependence of spin waves. The review of the anomalous behaviors of spin waves and the proposed models provide the directions for easier experimental study of spin waves by inelastic light scattering, which will be useful for raising the research efforts for investigating spin waves. This is important for the emerging research of magnonics, which has received extensive interests in the modern magnetism research community.

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Toward nonlinear magnonics: Intensity-dependent spin-wave switching in insulating side-coupled magnetic stripes

Cited by 112 publications

References 72 publications

Frequency‐Division Multiplexing in Magnonic Logic Networks Based on Caustic‐Like Spin‐Wave Beams

Frequency‐Division Multiplexing in Magnonic Logic Networks Based on Caustic‐Like Spin‐Wave Beams

Raman Scattering in Non-Stoichiometric Lithium Niobate Crystals with a Low Photorefractive Effect

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

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