Nonreciprocity of spin waves in magnonic crystals created by surface acoustic waves in structures with yttrium iron garnet

Kryshtal, R. G.; Medved, A. V.

doi:10.1016/j.jmmm.2015.07.086

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…Such magnonic crystals have been created via a periodic strain induced by a surface acoustic wave (SAW) traveling along a YIG spin-wave waveguide as shown in figure 5(c) [100,[221][222][223]. Spin-wave scattering in such a crystal differs conceptually from the previously discussed cases since it takes place with a shift in the spin-wave frequency due to the Doppler effect.…”

Section: Surface Acoustic Wave Based Moving Magnonic Crystalsmentioning

confidence: 99%

Magnonic crystals for data processing

Chumak

Serga

Hillebrands

2017

J. Phys. D: Appl. Phys.

439

320

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IntroductionThis article focuses on a selection of results in the field of magnonic crystals obtained within the last decade in our group. Special attention is devoted to the application of magnonic crystals in data processing and information technologies. Because of the large number of achievements in the field, it is unavoidable that many important results are excluded from this article. Therefore, we would like to direct the reader's attention to excellent reviews devoted to different aspects of magnonic crystals: spin-wave dynamics in periodic structures for microwave applications [1, 2], Brillouin light scattering (BLS) studies of planar metallic magnonic crystals [3], micromagnetic computer simulations of width-modulated waveguides [4], photo-magnonic aspects of antidot lattices studies [5], theoretical studies of one-dimensional monomode waveguides [6], and reconfigurable magnonic crystals [7]. The results presented in the current review were already partially presented in our own reviews of yttrium iron garnet (YIG) magnonics [8] and magnon spintronics [9] as well as in book chapters on dynamic magnonic crystals [10] and magnon spintronics [11].The article is organized in the following way: In the introduction we describe the field of magnon spintronics and discuss the role of magnonic crystals in it. The next section 2 is devoted to the properties of spin waves in thin planar films and waveguides, to the magnetic materials commonly used in the field, and to the methods of spin-wave excitation and detection. Sections 3 and 4 are devoted to the study of physical phenomena taking place in static and dynamic magnonic crystals, respectively. The application of magnonic crystals for magnonbased processing of analog and digital data is discussed in section 5. Specifically, static magnonic crystals can be used as passive elements, like microwave filters, resonators or delay lines for microwave generation. Reconfigurable and dynamic magnonic crystals are promising as active devices performing, for example, tunable filtering, frequency conversion or time reversal. In the final section we briefly summarize the results. Magnon spintronics: from electron-to magnon-based computingA disturbance in the local magnetic order can propagate in a magnetic material in the form of a wave. This wave was first predicted by Bloch in 1929 and was named spin wave since AbstractMagnons (the quanta of spin waves) propagating in magnetic materials with wavelengths at the nanometer-scale and carrying information in the form of an angular momentum can be used as data carriers in next-generation, nano-sized low-loss information processing systems. In this respect, artificial magnetic materials with properties periodically varied in space, known as magnonic crystals, are especially promising for controlling and manipulating magnon currents. In this article, different approaches for the realization of static, reconfigurable, and dynamic magnonic crystals are presented along with a variety of novel wave phenomena discovered in these cryst...

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Section: Surface Acoustic Wave Based Moving Magnonic Crystalsmentioning

confidence: 99%

Magnonic crystals for data processing

Chumak

Serga

Hillebrands

2017

J. Phys. D: Appl. Phys.

439

320

View full text Add to dashboard Cite

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“…Examples of this kind are MCs realised by periodic current fellow on top of a magnonic waveguide or by means of periodic modulation of temperature via local heating. Even travelling [232][233][234] and dynamic MC [235][236][237][238] have also been realised based on a similar idea. We do not aim to discuss those in the present topical review (for details see for example reference [149] and references therein).…”

Section: Magnonic Crystals For Gigahertz Magnonsmentioning

confidence: 99%

Magnonic crystals: towards terahertz frequencies

Zakeri

2020

J. Phys.: Condens. Matter

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This topical review presents an overview of the recent experimental and theoretical attempts on designing magnonic crystals for operation at different frequencies. The focus is put on the microscopic physical mechanisms involved in the formation of the magnonic band structure, allowed as well as forbidden magnon states in various systems, including ultrathin films, multilayers and artificial magnetic structures. The essential criteria for the formation of magnonic bandgaps in different frequency regimes are explained in connection with the magnon dynamics in such structures. The possibility of designing small-size magnonic crystals for operation at ultrahigh frequencies (terahertz and sub-terahertz regime) is discussed. Recently discovered magnonic crystals based on topological defects and using periodic Dzyaloshinskii-Moriya interaction, are outlined. Different types of magnonic crystals, capable of operation at different frequency regimes, are put within a rather unified picture.

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“…The foundations of coupling between phonons and magnons has been studied for many decades, starting with the study of magnetoelastic behaviour. There has been increased interest in the past decade with the development of potential devices to excite spin waves via acoustic waves [96][97][98][99][100][101]. One of the main advantages of acoustic excitation of spin waves is voltage driven piezoelectric crystals that operate at comparatively low-power and eliminate Joule heating effects.…”

Section: Phonon-magnonicsmentioning

confidence: 99%

Investigating a Phase Conjugate Mirror for Magnon-Based Computing

Inglis

2020

Springer Theses

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This thesis reports on the realisation of a phase conjugate spin wave device employing a four-wave mixing process. Unexpected nonlinear behaviour was revealed in further experiments which are reported on latterly.Chapter 1 introduces the motivation for this thesis: the need to avoid the stagnation of technological progress by investigating alternative computing paradigms, namely magnon-based computing. An introduction to the field of magnonics and magnon behaviour is presented, followed by a brief introduction to nonlinear behaviour.Chapter 2 builds on the general description of spin waves and introduces the concept of phase conjugation. Following an optical treatment of phase conjugation via fourwave mixing, a theoretical description of the phase conjugation in the spin wave regime is presented.Chapter 3 details the experimental materials and methods employed in the succeeding chapters. A description of the antenna design and fabrication processes is presented along with a description of the key experimental equipment.Chapter 4 describes an experimental investigation concerning the realisation of a phase conjugate mirror via four-wave mixing created in a spin wave system. It is demonstrated through experiments and simulations that the mirror is at its most reflective when a standing spin wave is present across the width of the magnon waveguide.Chapter 5 investigates a time-domain fractal arising from the spatio-temporally periodic potential that occurs as a result of the standing wave. The onset of greatgranddaughter fractal modes is observed and the frequency dependence of the amplitude of the fractal modes is discussed.Chapter 6 offers concluding remarks, and considers future experiments that may develop the field.

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Nonreciprocity of spin waves in magnonic crystals created by surface acoustic waves in structures with yttrium iron garnet

Cited by 13 publications

References 21 publications

Magnonic crystals for data processing

Magnonic crystals for data processing

Magnonic crystals: towards terahertz frequencies

Investigating a Phase Conjugate Mirror for Magnon-Based Computing

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