Výsledky vyhledávání - "A. A. Lomonosov"

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On properties of a semi-explicit in time fourth-order vector compact scheme for the multidimensional acoustic wave equation

Autor: Zlotnik, Alexander, Lomonosov, Timofey

We deal with an initial-boundary value problem for the multidimensional acoustic wave equation, with the variable speed of sound. For a three-level semi-explicit in time higher-order vector compact scheme, we prove stability and derive 4th order erro

Externí odkaz: http://arxiv.org/abs/2403.16174

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On a Doubly Reduced Model for Dynamics of Heterogeneous Mixtures of Stiffened Gases, its Regularizations and their Implementations

Autor: Zlotnik, A., Lomonosov, T.

We deal with the reduced four-equation model for the dynamics of heterogeneous compressible binary mixtures with the stiffened gas equations of state. We study its further reduced form, with the excluded volume concentrations, and with a quadratic eq

Externí odkaz: http://arxiv.org/abs/2305.10522

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Anatomy of ultrafast quantitative magneto-acoustics in freestanding nickel thin films

Autor: Ghita, Antonia, Mocioi, Tudor-Gabriel, Lomonosov, Alexey M., Kim, Jiwan, Kovalenko, Oleksandr, Vavassori, Paolo, Temnov, Vasily V.

We revisit the quantitative analysis of the ultrafast magneto-acoustic experiment in a freestanding nickel thin film by Kim and Bigot [1] by applying our recently proposed approach of magnetic and acoustic eigenmodes decomposition by Vernik et al. [2

Externí odkaz: http://arxiv.org/abs/2212.12673

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Additive Laser Excitation of Giant Nonlinear Surface Acoustic Wave Pulses

Autor: Deschamps, Jude, Kai, Yun, Lem, Jet, Chaban, Ievgeniia, Lomonosov, Alexey, Anane, Abdelmadjid, Kooi, Steven E., Nelson, Keith A., Pezeril, Thomas

The laser ultrasonics technique perfectly fits the needs for non-contact, non-invasive, non-destructive mechanical probing of samples of mm to nm sizes. This technique is however limited to the excitation of low-amplitude strains, below the threshold

Externí odkaz: http://arxiv.org/abs/2209.13897

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Resonant phonon-magnon interactions in free-standing metal-ferromagnet multilayer structures

Autor: Vernik, Urban, Lomonosov, Alexey M., Vlasov, Vladimir S., Kotov, Leonid N., Kuzmin, Dmitry A., Bychkov, Igor V., Vavassori, Paolo, Temnov, Vasily V.

Publikováno v: Phys. Rev B 106, 144420 (2022)

We analyze resonant magneto-elastic interactions between standing perpendicular spin wave modes (exchange magnons) and longitudinal acoustic phonon modes in free-standing hybrid metal-ferromagnet bilayer and trilayer structures. Whereas the ferromagn

Externí odkaz: http://arxiv.org/abs/2205.09805

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