Magnonic Metamaterials

Kruglyak, V. V.; Dvornik, Mykola; Mikhaylovskiy, R. V.; Dmytriiev, O.; Gubbiotti, G.; Tacchi, S.; Madami, M.; Carlotti, G.; Montoncello, F.; Giovannini, L.; Zivieri, Roberto; Kłos, Jarosław W.; Sokolovskyy, M. L.; Mamica, S.; Krawczyk, Maciej; Okuda, Masahiro; Eloi, Jean‐Charles; Ward, Simon; Schwarzacher, Walther; Schwarze, Thomas; Brandl, Florian; Grundler, D.; Berkov, D. V.; Semenova, Ekaterina; Gor, N.

doi:10.5772/37454

Cited by 9 publications

(14 citation statements)

References 115 publications

(142 reference statements)

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“…[14][15][16] Often, randomly oriented magnetic NPs have been addressed. [14,15,18] In the research field of magnonics, however, strictly periodic magnetic nanostructures that form artificial crystals are of crucial interest.…”

Section: Introductionmentioning

confidence: 99%

Top-down design of magnonic crystals from bottom-up magnetic nanoparticles through protein arrays

et al. 2017

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We show that chemical fixation enables top-down micro-machining of large periodic 3D arrays of protein-encapsulated magnetic nanoparticles (NPs) without loss of order. We machined 3D micro-cubes containing a superlattice of NPs by means of focused ion beam etching, integrated an individual micro-cube to a thin-film coplanar waveguide and measured the resonant microwave response. Our work represents a major step towards well-defined magnonic metamaterials created from the self-assembly of magnetic nanoparticles. Keywords: Self-assembly; magnetic nanoparticle; Ferritin; Chemical fixation; Ferromagnetic resonance; Magnonic metamaterial; Magnonics Magnonic crystals from protein array 2 IntroductionInorganic NPs coated with surfactants can self-assemble via hydrophilic or hydrophobic interactions to form regular 2D or 3D structures (colloidal crystals) [1][2][3][4][5][6][7][8] and NPs coated with biological molecules, DNA or proteins can also form highly ordered structures with tunable lattice parameters. [9,10] Many potential applications for such materials require their patterning into well-defined shapes and the exact positioning of the self-assembled superlattices. For example, thin sections of semiconductor colloidal crystals would be useful for electronic devices exploiting the charge storage capacity of the NPs[11] and shaped arrays of metal NPs for plasmonic devices. [12] To develop integrated devices containing functional NPs periodically arranged in three dimensions, it is necessary to fabricate samples of the self-assembled 3D NPs arrays with welldefined geometries, often with flat surfaces, to precisely generate and analyze electric and magnetic properties. This is in particular true for superlattices consisting of ordered magnetic particles. Here, the long-range magnetic stray fields and demagnetization effect depend critically on the surfaces and alter the internal magnetic field. The internal magnetic field rules the microwave response and spin-wave (magnon) modes [13] which are of relevance in very different fields ranging from biomedicine[14] to microwave devices [15] and magnonics [16]. Non-flat or irregular surfaces do not allow one to precisely determine the demagnetization factors necessary for a detailed data analysis. At the same time three-dimensionally arranged nanoparticles are expected to exhibit lattice-induced anisotropic properties that might be compromised by irregular shapes. Therefore, a method to machine an exact shape and size with well-defined surfaces is indispensable for device development and applications while still keeping the periodicity of the NPs. Also precise positioning of the machined structure is of utmost importance.Thin sections of magnetic NPs are of special interest for their magnetotransport properties[17] and for use in magnetic devices operated at microwave frequencies. [14][15][16] Often, randomly oriented magnetic NPs have been addressed. [14,15,18] In the research field of magnonics, however, strictly periodic magnetic nanostructures that form artifici...

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Section: Introductionmentioning

confidence: 99%

Top-down design of magnonic crystals from bottom-up magnetic nanoparticles through protein arrays

et al. 2017

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“…88) In analogy, Co(O)OH 89) 91) Many metal hydroxide NPs can be grown from the respective metal ion without an oxidizer. Ni(OH) 2 23) and Cr(OH) 3 23) have been fabricated in apoferritin, as well as ZnO 93) and Y 2 O 3 , 94) which are based on the dehydration of Zn(OH) 2 and Y(OH) 3 , respectively.…”

Section: Apoferritinmentioning

confidence: 99%

“…Many researchers have fabricated periodic magnetic materials consisting of antidots or wires with 50-100 nm width and=or pitch. These structures are usually produced by focused ion beam (FIB) strategies; 88,165) however, it is difficult to form periodic magnetic structures smaller than 50 nm. To solve the problem, an apoferritin crystallization technique was used.…”

Section: Apoferritinmentioning

confidence: 99%

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Nanoscale device architectures derived from biological assemblies: The case of tobacco mosaic virus and (apo)ferritin

Calò

Eiben

Okuda

et al. 2016

Jpn. J. Appl. Phys.

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Virus particles and proteins are excellent examples of naturally occurring structures with well-defined nanoscale architectures, for example, cages and tubes. These structures can be employed in a bottom-up assembly strategy to fabricate repetitive patterns of hybrid organic–inorganic materials. In this paper, we review methods of assembly that make use of protein and virus scaffolds to fabricate patterned nanostructures with very high spatial control. We chose (apo)ferritin and tobacco mosaic virus (TMV) as model examples that have already been applied successfully in nanobiotechnology. Their interior space and their exterior surfaces can be mineralized with inorganic layers or nanoparticles. Furthermore, their native assembly abilities can be exploited to generate periodic architectures for integration in electrical and magnetic devices. We introduce the state of the art and describe recent advances in biomineralization techniques, patterning and device production with (apo)ferritin and TMV.

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“…Concerning bi-component 3D MCs the big challenge is their fabrication, especially if the lattice constant is in the nanometer range. Generally, there are two approaches to the fabrication of such structures: top-down and bottom-up [50]. In top-down methods holes are drilled in the bulk material (matrix) and filled with another magnetic material (inclusions).…”

Section: Magnonic Band Gap In Three-dimensional Magnonic Crystalsmentioning

confidence: 99%

Magnonic crystals—Prospective structures for shaping spin waves in nanoscale

Rychły

Gruszecki

Mruczkiewicz

et al. 2015

Low Temperature Physics

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We have investigated theoretically band structure of spin waves in magnonic crystals with periodicity in one-(1D), two-(2D) and three-dimensions (3D). We have solved Landau-Lifshitz equation with the use of plane wave method, finite element method in frequency domain and micromagnetic simulations in time domain to find the dynamics of spin waves and spectrum of their eigenmodes. The spin wave spectra were calculated in linear approximation. In this paper we show usefulness of these methods in calculations of various types of spin waves. We demonstrate the surface character of the Damon-Eshbach spin wave in 1D magnonic crystals and change of its surface localization with the band number and wavenumber in the first Brillouin zone. The surface property of the spin wave excitation is further exploited by covering plate of the magnonic crystal with conductor. The band structure in 2D magnonic crystals is complex due to additional spatial inhomogeneity introduced by the demagnetizing field. This modifies spin wave dispersion, makes the band structure of magnonic crystals strongly dependent on shape of the inclusions and type of the lattice. The inhomogeneity of the internal magnetic field becomes unimportant for magnonic crystals with small lattice constant, where exchange interactions dominate. For 3D magnonic crystals, characterized by small lattice constant, wide magnonic band gap is found. We show that the spatial distribution of different materials in magnonic crystals can be explored for tailored effective damping of spin waves.

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Magnonic Metamaterials

Cited by 9 publications

References 115 publications

Top-down design of magnonic crystals from bottom-up magnetic nanoparticles through protein arrays

Top-down design of magnonic crystals from bottom-up magnetic nanoparticles through protein arrays

Nanoscale device architectures derived from biological assemblies: The case of tobacco mosaic virus and (apo)ferritin

Magnonic crystals—Prospective structures for shaping spin waves in nanoscale

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