A Method for the 2-D Quasi-Isometric Regular Grid Generation

Chumakov, G. A.; Chumakov, Sergei

doi:10.1006/jcph.1998.5968

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…The respective width of the GSG lines is 400 nm–600 nm–400 nm, with a G–S center-to-center distance of 1.1 μm. Additional information on the antenna field distribution is given in Supporting Information. , …”

Section: Methodsmentioning

confidence: 99%

Propagation of Spin-Wave Packets in Individual Nanosized Yttrium Iron Garnet Magnonic Conduits

et al. 2020

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Modern-days CMOS-based computation technology is reaching fundamental limitations which restrain further progress towards faster and more energy efficient devices [1]. A promising path to overcome these limitations is the emerging field of magnonics which utilizes spin waves for data transport and computation operations [2-5]. Many different devices have already been demonstrated on the macro-and microscale [2,4-12]. However, the feasibility of this technology essentially relies on the scalability to the nanoscale and a proof that coherent spin waves can propagate in these structures.Here, we present a study of the spin-wave dynamics in individual yttrium iron garnet (YIG) magnonic conduits with lateral dimensions down to 50 nm. Space and time resolved micro-focused Brillouin-Light-Scattering (BLS) spectroscopy is used to extract the exchange constant and directly measure the spin-wave decay length and group velocity. Thereby, the first experimental proof of propagating spin waves in individual nano-sized YIG conduits and the fundamental feasibility of a nano-scaled magnonics are demonstrated.State of the art investigations are typically performed in micron-sized structures [13][14][15] lacking the final push to the nanoscale and are often based on the so-called Damon-Eshbach (DE) geometry, since this geometry provides a high spin-wave group velocity [16]. However, large bias magnetic fields are required to achieve the corresponding magnetization state in nano-sized conduits. Therefore, using the Backward-Volume (BV) geometry is a necessity regarding any application of spin waves for data processing, since it corresponds to the natural self-magnetized state of such a conduit. Besides the propagation geometry, the choice of material is crucial as well. Being the material providing the lowest known spin-wave damping, yttrium iron garnet (YIG) is the naturally preferred material for magnonics. However, this comes at the cost of a complex crystallographic structure [17] featuring a unit cell size of 1.2376 nm [18], which opens up the question whether the material can be scaled down to the nanoscale while preserving its unique properties during this process.Here, a thin (111) YIG film with a thickness of = 44 nm is used, which is grown on top of a 500 µm thick (111) Gadolinium Gallium Garnet (GGG) substrate by Liquid Phase Epitaxy (LPE) [19]. A preliminary characterization by stripline Vector-Network-Analyzer ferromagnetic resonance (VNA-FMR) spectroscopy [20,21] is performed to obtain the fundamental magnetic properties. The measurement, shown in Supplementary Fig. S1, yields a saturation magnetization of s = (140.7 ± 2.8) kA m and a Gilbert damping parameter of = (1.75 ± 0.08) × 10 −4 . These values are common for high-quality YIG thin films [19]. Thereafter, the nanostructuring process is carried out by Figure 2| Measurement of the thermal spin-wave population and determined exchange constant. (a) Exemplary thermal BLS spectra in the absence of any microwave excitation for a = 1000 YIG waveguide. A field dependent ...

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Section: Methodsmentioning

confidence: 99%

Propagation of Spin-Wave Packets in Individual Nanosized Yttrium Iron Garnet Magnonic Conduits

et al. 2020

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“…The grid approach based on the minimization of the functional (1.22) for n = 2 was also used by Chumakov and Chumakov (1998) for generating quasi-isometric grids by introducing in Ξ 2 a monitor metric borrowed from the metric of a surface of a constant Gauss curvature.…”

Section: Variational Methodsmentioning

confidence: 99%

A Computational Differential Geometry Approach to Grid Generation

Liseikin¹

2007

Scientific Computation

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“…With the development of scientific and technical prog ress, systematic identification of factors determining the operational properties and cost of building materials and, as a consequence, the potential possibilities of their regu lation become more and more urgent [1].…”

Section: Introductionmentioning

confidence: 99%

“…They combine a large number of composite cathodes and are multiphase systems consisting of a metal matrix (sponge), in the pores and on the surface of which an emission active substance is located. In the process of impregnating the sponge with an emission active substance, Ba 3 WO 6 is formed, which explains the presence of barium on the emitter surface [1]. Consequently, studies of the proper ties of this compound, in particular its crystal structure, are relevant.…”

Section: Introductionmentioning

confidence: 99%

Research of mineralogical composition, structure and properties of the surface of Ukrainian ash microspheres

Demchenko

Simyachko

Svidersky

2017

TAPR

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рАЗрАбОтКА ОГнестОйКОГО пОКрытия Для ЗАщиты элеКтричесКих КАбелей при пОжАре В ЗАмКнутОм прОстрАнстВе Приводятся результаты разработки и оптимизации соста ва огнестойкого покрытия для защиты кабельной изоляции при пожаре в замкнутом пространстве. Компоненты покры тия выбраны по требованиям огнестойкости и токсичности. Обоснован предполагаемый механизм работы огнестойкого покрытия при пожаре. Проведены лабораторные испытания образцов огнестойких покрытий. Получена временная зави симость температуры на обратной стороне огнестойкого по крытия от состава композиции. Ключевые слова: нетоксичное огнестойкое интумесцентное покрытие для защиты кабельной изоляции, компоненты со става, методика испытаний.

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A Method for the 2-D Quasi-Isometric Regular Grid Generation

Cited by 8 publications

References 17 publications

Propagation of Spin-Wave Packets in Individual Nanosized Yttrium Iron Garnet Magnonic Conduits

Propagation of Spin-Wave Packets in Individual Nanosized Yttrium Iron Garnet Magnonic Conduits

A Computational Differential Geometry Approach to Grid Generation

Research of mineralogical composition, structure and properties of the surface of Ukrainian ash microspheres

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