Observation of angle-dependent mode conversion and mode hopping in 2D annular antidot lattice

Porwal, Nikita; De, Anulekha; Mondal, Sucheta; Dutta, Koustuv; Choudhury, Samiran; Sinha, Jaivardhan; Barman, Anjan; Datta, P. K.

doi:10.1038/s41598-019-48565-8

Cited by 4 publications

(2 citation statements)

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“…Anti-rings are another type of interesting structure and direct mapping of static and dynamic magnetizations their potential application in biosensing have been reported 149 . More recently, SW mode conversion and mode hopping in anti-ring structures has been observed 150 , leading towards their potential use in magnonics.…”

Section: Magnetic Ringsmentioning

confidence: 99%

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: Magnetic Ringsmentioning

confidence: 99%

Magnetization dynamics of nanoscale magnetic materials: A perspective

Barman

Mondal

Sahoo

et al. 2020

Journal of Applied Physics

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“…PLEASE CITE THIS ARTICLE AS DOI: 10.1063/5.0085623 beam lithography and ion milling 29,46 , deep ultraviolet lithography and lift-off 33,47 , Focused Ion Beam (FIB) [48][49][50][51] or template synthesis in porous membranes 52 . Among them, Ga + FIB milling is widely used because it is a fast direct writing technique into a magnetic thin film.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ga+ milling on the spin waves modes in a Co2MnSi Heusler magnonic crystal

Mantion

Biziere

2022

Journal of Applied Physics

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Ferromagnetic resonance experiment was performed to study the magnonic modes of an antidot lattice nanopatterned in a sputtered Co2MnSi Heusler alloy thin film. The magnonic crystal was prepared with a Ga+ focused ion beam, and micromagnetic simulations were used to explain qualitatively and quantitatively the complex experimental spin waves spectrum. We demonstrate the necessity to consider the geometrical imperfections and the modification of the Co2MnSi magnetic parameters induced by the nanofabrication process to describe the evolution of the frequencies and spatial profiles of the principal experimental spin waves modes in the 0–300 mT magnetic field range. In particular, our model suggests that Ga+ milling induces a drastic decrease (between 80% and 90%) in the bulk Co2MnSi magnetic parameters. In addition, simulations reveal the presence of a diversity of localized and extended spin waves modes whose spatial profiles are closely related to the evolution of the magnetic state at equilibrium from a very non-collinear configuration up to a quasi-saturated state.

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