Anisotropic spin-wave dispersion in two-dimensional Ni80Fe20 diatomic nanodot array

De, Anulekha; Banerjee, Chandrima; Chaurasiya, Avinash Kumar; Mandal, Ruma; Otani, Y.; Mitra, Rajib Kumar; Barman, Anjan

doi:10.1016/j.jmmm.2019.165557

Cited by 4 publications

(4 citation statements)

References 28 publications

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“…New interaction modes appeared in this structure due to strong dipolar coupling between the inter-dot interaction in the diatomic unit 159 . A strong anisotropy in the SW dispersion is observed in this structure, which is also evident in the iso-frequency curves, promising their applications in magnon focusing and defocusing 160 . Observation of spectral narrowing and mode conversion in novel binary nanostructure has been reported where square-shaped Py nanodots of two different sizes are diagonally connected to form a binary basis 161 .…”

Section: Binary Magnetic Nanostructuresmentioning

confidence: 66%

Magnetization dynamics of nanoscale magnetic materials: A perspective

Barman

Mondal

Sahoo

et al. 2020

Journal of Applied Physics

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Nanomagnets form the building blocks for a gamut of miniaturized energyefficient devices including data storage, memory, wave-based computing, sensors and biomedical devices. They also offer a span of exotic phenomena and stern challenges. The rapid advancements of nanofabrication, characterization and numerical simulations during last two decades have made it possible to explore a plethora of science and technology related to nanomagnet dynamics. The progress in the magnetization dynamics of single nanomagnets and one-and two-dimensional arrays of nanostructures in the form of dots, antidots, nanoparticles, binary and bicomponent structures and patterned multilayers have been presented in details.Progress in unconventional and new structures like artificial spin ice and three-dimensional nanomagnets and spin textures like domain walls, vortex and skyrmions have been presented. Furthermore, a huge variety of new topics in the magnetization dynamics of magnetic nanostructures are rapidly emerging. An overview of the steadily evolving topics like spatiotemporal imaging of fast dynamics of nanostructures, dynamics of spin textures, artificial spin ice have been discussed. In addition, dynamics of contemporary and newly transpired magnetic architectures such as nanomagnet arrays with complex basis and symmetry, magnonic quasicrystals, fractals, defect structures, novel three-dimensional structures have been introduced. Effects of various spin-orbit coupling and ensuing spin textures as well as quantum hybrid systems comprising of magnon-photon, magnon-phonon and magnon-magnon coupling, antiferromagnetic nanostructures are rapidly growing and are expected to dominate this research field in the coming years. Finally, associated topics like nutation dynamics and nanomagnet antenna are briefly discussed. Despite showing a great progress, only a small fraction of nanomagnetism and its ancillary topics have been explored so far and huge efforts are envisaged in this evergrowing research area in the generations to come.

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Section: Binary Magnetic Nanostructuresmentioning

confidence: 66%

Magnetization dynamics of nanoscale magnetic materials: A perspective

Barman

Mondal

Sahoo

et al. 2020

Journal of Applied Physics

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“…The magnonic spectra can be drastically different in these two cases of magnetic ground states [306]. The precessional magnetization dynamics in 2D arrays of magnetic dots made of two different dots sizes have also been studied [343,344].…”

Section: Effects Of Geometric Parameters On Spin Waves In Nanomagnet ...mentioning

confidence: 99%

“…Arrays of magnetic dots, made of the same element but with different sizes, show very interesting collective dynamics. A significant variation in the number of dynamical modes, their profiles, and slopes of the magnonic bands are observed when the in-plane orientation of the bias magnetic field is varied [152][153][154]. In nanometer scale magnetic dots, defects in the form of edge roughness, local thickness variation, etc can generate new resonant modes and quench the existing modes in isolated as well as arrays of magnetic dots [155].…”

Section: Sws In 2d Arrays Of Nanomagnetsmentioning

confidence: 99%

“…The magnonic spectra can be drastically different in these two cases of magnetic ground states [122]. The precessional dynamics of magnetization in 2D arrays of magnetic dots made of two different dot sizes have also been studied [153,154]. Effort has been made to prepare 1D nanomagnet array by step modulated thickness either made of a single material [172] or two different materials [128,173].…”

Section: Effects Of Geometric Parameters On Sws In Nanomagnet Arraysmentioning

confidence: 99%

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Applications of nanomagnets as dynamical systems: II

et al. 2021

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In Part I of this topical review, we discussed dynamical phenomena in nanomagnets, focusing primarily on magnetization reversal with an eye to digital applications. In this part, we address mostly wave-like phenomena in nanomagnets, with emphasis on spin waves in myriad nanomagnetic systems and methods of controlling magnetization dynamics in nanomagnet arrays which may have analog applications. We conclude with a discussion of some interesting spintronic phenomena that undergird the rich physics exhibited by nanomagnet assemblies.

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Magnonic notch filter based on spin wave caustic beams

Swyt,

Compton,

Reyes-Almanza

et al. 2024

Applied Physics Letters

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Here, we study a magnonic crystal made of low-damping yttrium iron garnet that utilizes pseudo-caustic spin wave beams generated from subwavelength square well features arranged in a two-dimensional array. The lattice symmetry and the angle between the caustic beam propagation direction and the applied magnetic field were tailored to optimize the interaction of spin waves with the engineered defects. A prominent, narrow 3 MHz feature with large rejection efficiency is observed in the spin wave transmission spectrum that could be useful as a narrowband notch filter, and time- and space-resolved Brillouin light scattering (BLS) measurements suggest that both caustic interference and edge effects may contribute to this notch feature. Furthermore, the BLS measurements show that caustics are generated efficiently at the laser ablated wells, and by tuning the frequency by 30 MHz, the caustic beam angles and, hence, the details of how the spin wave caustics hit the ablated wells change sufficiently to add and remove caustic beams, which can be used to create additional device functionality. The generation and conversion of caustic beams show promise for applications that require directional energy transport and for magnonic devices.

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Anisotropic spin-wave dispersion in two-dimensional Ni80Fe20 diatomic nanodot array

Cited by 4 publications

References 28 publications

Magnetization dynamics of nanoscale magnetic materials: A perspective

Magnetization dynamics of nanoscale magnetic materials: A perspective

Applications of nanomagnets as dynamical systems: II

Magnonic notch filter based on spin wave caustic beams

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