A current-controlled, dynamic magnonic crystal

Chumak, A. V.; Neumann, Timo; Serga, A. A.; Hillebrands, B.; Kostylev, Mikhail

doi:10.1088/0022-3727/42/20/205005

Cited by 181 publications

(164 citation statements)

References 32 publications

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“…It is shown that the process is one of oscillatory inter-modal energy exchange. We explore the features of the effect experimentally using spin waves (magnetic excitations, the quanta of which are known as magnons [15,17]) in a dynamic magnonic crystal (DMC) [8,14,15], and show that results are consistent with a theoretical description of the coupling phenomenon which models the waves as interacting harmonic oscillators.…”

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confidence: 82%

“…Such systems-which include optical photonic crystals [1][2][3][4][5][6][7] and magnetic magnonic crystals [8][9][10][11][12][13][14][15]-belong to the class of so-called metamaterials: synthetic media with properties derived from an engineered mesoscopic structure. The wave transmission spectra of artificial crystals typically include band gaps which arise as a result of resonant wave-lattice interactions analogous to the atomic-scale Bragg scattering phenomena observed in natural crystals [16].…”

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confidence: 99%

“…The one-dimensional DMC comprises a planar metallic meander structure (period a = 300 µm) situated close to the surface of an yttrium iron garnet (YIG) thin-film spin-wave waveguide [8,15]. An antenna is provided at each end, and a static bias magnetic field B 0 = 180 mT is applied along the spin-wave propagation direction.…”

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confidence: 99%

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Oscillatory Energy Exchange between Waves Coupled by a Dynamic Artificial Crystal

et al. 2012

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We describe a general mechanism of controllable energy exchange between waves propagating in a dynamic artificial crystal. We show that if a spatial periodicity is temporarily imposed on the transmission properties of a wave-carrying medium whilst a wave is inside, this wave is coupled to a secondary counter-propagating wave and energy oscillates between the two. The oscillation frequency is determined by the width of the spectral band gap created by the periodicity and the frequency difference between the coupled waves. The effect is demonstrated with spin waves in a dynamic magnonic crystal.

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confidence: 82%

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confidence: 99%

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Oscillatory Energy Exchange between Waves Coupled by a Dynamic Artificial Crystal

et al. 2012

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“…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.…”

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confidence: 99%

Optically reconfigurable magnetic materials

et al. 2015

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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 ...

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“…Wherein the frequency selectivity and waveguide properties of the device are achieved by creating a priority for wave propagating with certain k in magnonic crystals or SW confinements. [6][7][8] Extended in plane YIG films are grown by different techniques on gallium gadolinium substrates directly [9][10][11] or with copper interlayer. 12 In consequence, patterns of the required sizes are cut 13 or etched 14 from the film.…”

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confidence: 99%

Perpendicularly magnetized YIG-film resonators and waveguides with high operating power

Balinskiy

Mongolov²,

Montes

et al. 2016

AIP Advances

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We propose a novel technique for building YIG film-based resonators and waveguides for high power operating microwave devices. Our approach is based on the effect of total internal reflection (TIR) at the interface between the non-metalized and metalized regions of YIG film, which take place for forward volume magnetostatic spin waves in perpendicularly magnetized YIG films. Prototype resonators and waveguides were designed, fabricated, and tested. The obtained experimental data demonstrate high quality factor of 50 dB and a high power operation up to +15 dBm in the frequency range from 1.8 GHz to 5.1 GHz. Application of such resonators and waveguides in electrically tunable microwave oscillators promises an extremely low phase noises about −135 dB/Hz at 10 kHz offset.

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A current-controlled, dynamic magnonic crystal

Cited by 181 publications

References 32 publications

Oscillatory Energy Exchange between Waves Coupled by a Dynamic Artificial Crystal

Oscillatory Energy Exchange between Waves Coupled by a Dynamic Artificial Crystal

Optically reconfigurable magnetic materials

Perpendicularly magnetized YIG-film resonators and waveguides with high operating power

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