Spin-wave eigenmodes in direct-write 3D nanovolcanoes

Dobrovolskiy, Oleksandr V.; Vovk, N. R.; Bondarenko, A. V.; Bunyaev, S. A.; Lamb-Camarena, Sebastian; Zenbaa, N.; Sachser, Roland; Barth, Sven; Guslienko, K. Yu.; Chumak, A. V.; Huth, Michael; Kakazei, G. N.

doi:10.1063/5.0044325

Cited by 28 publications

(20 citation statements)

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“…[142,144,244,278,279] FEBID is based on the electron beam-induced dissociation of a single or multiple precursor gas molecules, which results in a nonvolatile leftover shaped in accordance with the desired geometry. For instance, various ferromagnetic FEBID nanoarchitectures have already been demonstrated, such as nanovolcanoes, [280] free-standing nanostripes, [241] see Figure 7g, nanoscale double-helix structures, [244] nanocubes and nanotrees, [141,142,281] nanoamphoras, [243] buckyballs, [142,243] and complex-shape nanoarchitectures, [282] see Figure 7g. The use of double precursor gases allows one to exploit the FEBID technique for material segregation, resulting in a one-step fabrication of magnetic tubular structures with a nonmagnetic core at the scale of 100 nm.…”

Section: Fabrication Methodsmentioning

confidence: 99%

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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condensed matter physics, including cell membranes, [1] nematic crystals, [2,3] superfluids, [4] semiconductors, [5][6][7][8] ferromagnets, [9] and superconductors. [10,11] Currently, much attention is paid to strongly correlated electronic systems, for example, ferromagnets and superconductors, as they provide a unique tool to manipulate the topology of coexisting vector and scalar fields, associated with geometries of conventional systems.Until recently, in the case of magnetism, the influence of the geometry on the spin vector fields was addressed primarily by the design of the sample boundaries. This approach naturally brings the shape anisotropy to the system and leads to the formation of specific spin textures, for example, magnetic vortices [12] and antivortices [13] as well as provides control over the dynamics of the topologically nontrivial magnetic solitons. [14][15][16][17][18] This discussion also tackles the state of the art in modern experimental antiferromagnetism, where the design of the sample topography and boundaries allows to control the domain wall states. [19][20][21][22] With the development of novel fabrication techniques allowing to realize complex 3D architectures, not only the boundary effects but also the extrinsic geometrical properties (e.g., local curvatures) can be addressed rigorously for the case of ferromagnets [23][24][25][26][27] as well as superconductors. [28][29][30] The explored effects are directly related to the interplay between the Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro-and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-...

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Section: Fabrication Methodsmentioning

confidence: 99%

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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“…It was demonstrated that the extension of 2D nanodisks into the third dimension allows the on-demand engineering of their lowest eigenfrequencies by using 3D nanovolcanoes having about 30% smaller footprints. Micromagnetic simulations revealed that the ring encircling the volcano crater leads to an effective confinement of the low-frequency eigenmodes under the volcano crater, because of the strongly non-uniform internal magnetic field, while the higher-frequency eigenmodes are confined in the ring area [216]. The presented 3D nanovolcanoes can be viewed as multi-mode resonators and as 3D building blocks for nanomagnonics.…”

Section: Direct-write 3d Magnonic Nano-architecturesmentioning

confidence: 97%

“…The largely exploited physical vapor deposition is of restricted use due to shadowing effects. The obstacle has recently been overcome by focused electron beam-induced deposition of e.g., Co-Fe [216] and chemically assisted atomic layer deposition (ALD) [217]. To evidence the versatility of ALD-grown Ni [218], [219] and Ni80Fe20 [220] for large-aspect-ratio 3D magnonic nanodevices, ferromagnetic nanotubes have been prepared as shells around nanotemplates consisting of vertically standing non-magnetic nanowires (Fig.…”

Section: B Conformal Ferromagnetic Coatings For Tubular Magnon Condui...mentioning

confidence: 99%

“…Thus, given FEBID's lateral resolution down to about 50 nm (in free-standing magnetic 3D nano-architectures) and its versatility regarding the substrate material, FEBID appears as an interesting nanofabrication technology for 3D magnonics, see Recently, spin-wave eigenmodes were investigated experimentally in individual direct-write Co-Fe nanovolcanoes (Fig. IV.C(c)) by spin-wave resonance spectroscopy [216]. It was demonstrated that the extension of 2D nanodisks into the third dimension allows the on-demand engineering of their lowest eigenfrequencies by using 3D nanovolcanoes having about 30% smaller footprints.…”

Section: Direct-write 3d Magnonic Nano-architecturesmentioning

confidence: 99%

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Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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“…Spin waves, and their quanta magnons, are of great interest as potential data carriers in future low-energy data processing devices [1,2]. The phase of a spin wave and its pronounced nonlinear properties provide additional degrees of freedom [3][4][5][6], while the scalability of 2D and 3D structures [7,8] and wavelengths [9][10][11][12] down to the nanometer regime are further advantages. Moreover, the utilization of macroscopic quantum states like Bose-Einstein condensation of magnons [13][14][15] and quantum operations with single magnons [16] are very promising.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids

Dobrovolskiy,

Chumak

2021

Preprint

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Ferromagnet/superconductor heterostructures allow for the combination of unique physical phenomena offered by the both fields of magnetism and superconductivity. It was shown recently that spin waves can be efficiently scattered in such structures by a lattice of static or moving magnetic flux quanta (Abrikosov vortices), resulting in bandgaps in the spin-wave spectra. Here, we realize a nonreciprocal motion of a vortex lattice in nanoengineered symmetric and asymmetric pinning landscapes and investigate the non-reciprocal scattering of magnons on fluxons. We demonstrate that the magnon bandgap frequencies can be tuned by the application of a low-dissipative transport current and by its polarity reversal. Furthermore, we exploit the rectifying (vortex diode or ratchet) effect by the application of a 100 MHz-frequency ac current to deliberately realize bandgap up-or downshifts during one ac halfwave while keeping the bandgap frequency constant during the other ac halfwave. The investigated phenomena allow for the realization of energy-efficient hybrid magnonic devices, such as microwave filters with an ultra-high bandgap tunability of 10 GHz/mA and a fast modulation of the transmission characteristics on the 10 ns time scale.

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Spin-wave eigenmodes in direct-write 3D nanovolcanoes

Abstract: Paper published as part of the special topic on Mesoscopic Magnetic Systems: From Fundamental Properties to Devices ARTICLES YOU MAY BE INTERESTED INLong-range spin-wave propagation in transversely magnetized nano-scaled conduits

Cited by 28 publications

References 51 publications

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

Advances in Magnetics Roadmap on Spin-Wave Computing

Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids

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