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We investigate generation of exchange magnons by ultrashort, picosecond acoustic pulses propagating through ferromagnetic thin films. Using the Landau-Lifshitz-Gilbert equations we derive the dispersion relation for exchange magnons for an…

Mesoscale and Nanoscale Physics · Physics 2020-03-17 V. Besse , A. V. Golov , V. S. Vlasov , A. Alekhin , D. Kuzmin , I. V. Bychkov , L. N. Kotov , V. V. Temnov

We study the magnetic damping in the simplest of synthetic antiferromagnets, i.e. antiferromagnetically exchange-coupled spin valves in which applied magnetic fields tune the magnetic configuration to become noncollinear. We formulate the…

Mesoscale and Nanoscale Physics · Physics 2015-08-07 Takahiro Chiba , Gerrit E. W. Bauer , Saburo Takahashi

An exact analytical model of the process of collision and nonlinear interaction of gravitational and/or electromagnetic soliton wave and strong non-soliton electromagnetic traveling wave of arbitrary profile propagating in the expanding…

General Relativity and Quantum Cosmology · Physics 2016-04-11 G. A. Alekseev

We study the propagation of gravitational waves in a collisionless plasma with an external magnetic field parallel to the direction of propagation. Due to resonant interaction with the plasma particles the gravitational wave experiences…

General Relativity and Quantum Cosmology · Physics 2010-11-19 Martin Servin , Gert Brodin , Mattias Marklund

We develop a consistent semiclassical theory of spin dynamics for an isotropic ferromagnet with a spin $ S=1$ taking into consideration both bilinear and biquadratic over spin operators exchange interaction. For such non-Heisenberg magnets,…

Other Condensed Matter · Physics 2009-11-13 B. A. Ivanov , A. Yu. Galkin , R. S. Khymyn , A. Yu. Merkulov

Dynamics of clumps within a magnetized advection dominated accretion flow is investigated by solving the collisionless Boltzmann equation and considering the drag force due to the relative velocity between the clumps and the gas. Toroidal…

Astrophysics of Galaxies · Physics 2015-06-18 Fazeleh Khajenabi , Mina Rahmani , Shahram Abbassi

We report an enhanced magnetoelastic contribution to the Gilbert damping in highly magnetostrictive Fe$_{0.7}$Ga$_{0.3}$ thin films. This effect is mitigated for perpendicular-to-plane fields, leading to a large anisotropy of the Gilbert…

Materials Science · Physics 2021-06-16 William K. Peria , Xinjun Wang , Heshan Yu , Seunghun Lee , Ichiro Takeuchi , Paul A. Crowell

We demonstrate using micromagnetic simulations and a theoretical model that a gradient in the saturation magnetization ($M_s$) of a perpendicularly magnetized ferromagnetic film induces a non-reciprocal spin wave propagation and,…

Other Condensed Matter · Physics 2021-04-14 Pablo Borys , Oleg Kolokoltsev , Naser Qureshi , Martin L. Plumer , Theodore L. Monchesky

Dynamics of the magnetization in ferromagnets is examined in the presence of transport electrons allowing the latter to interact. It is found that the existence of inhomogeneities such as domain wall (DW) structures, leads to changes that…

Strongly Correlated Electrons · Physics 2009-11-13 Paulo F. Farinas

The dynamical behaviors of electromagnetic (EM) solitons formed due to nonlinear interaction of linearly polarized intense laser light and relativistic degenerate plasmas are studied. In the slow motion approximation of relativistic…

Plasma Physics · Physics 2022-06-22 Sima Roy , A. P. Misra

Here we show that asymmetric fully-localized flexural-gravity lumps can propagate on the surface of an inviscid and irrotational fluid covered by a variable-thickness elastic material, provided that the thickness varies only in one…

Fluid Dynamics · Physics 2015-06-18 Yong Liang , Mohammad-Reza Alam

Magnetism typically arises from the effect of exchange interactions on highly localized fermionic wave functions in f- and d-atomic orbitals. In rhombohedral multilayer graphene (RMG), in contrast, magnetism-manifesting as spontaneous…

Dynamics of flexible ferromagnetic filaments in an external magnetic field is considered. We report the existence of a buckling instability of the ferromagnetic filament at the magnetic field reversion, which leads to the formation of a…

Soft Condensed Matter · Physics 2010-11-12 K. Ērglis , R. Livanovičs , A. Cēbers

Due to the effects of surface electromigration, waves can propagate over the free surface of a current-carrying metallic or semiconducting film of thickness h_0. In this paper, waves of finite amplitude, and slow modulations of these waves,…

Pattern Formation and Solitons · Physics 2009-11-07 R. Mark Bradley

The formation of quasi-2D spin-wave waveforms in longitudinally magnetized stripes of ferrimagnetic film was observed by using time- and space-resolved Brillouin light scattering technique. In the linear regime it was found that the…

Pattern Formation and Solitons · Physics 2007-05-30 A. A. Serga , M. Kostylev , B. Hillebrands

We report investigation of ferromagnetic resonance phenomenon in ferromagnetic thin films with essentially non-uniform composition. Epitaxial Pd-Fe thin film with linear distribution of Fe content across the thickness is used as the model…

We present a comprehensive experimental and numerical study of magnetization dynamics triggered in a thin metallic film by single-cycle terahertz pulses of $\sim20$ MV/m electric field amplitude and $\sim1$ ps duration. The experimental…

We demonstrate that moving edge dislocations can induce the reversal of magnetization in a ferromagnetic film due to the Barnett effect. The dynamics of magnetization is studied numerically within a discretized Landau-Lifshitz equation on a…

Materials Science · Physics 2025-12-01 Jorge F. Soriano , Eugene M. Chudnovsky

We investigate analytically and numerically a nonlinear modification of the magnetospheric plasma density under the action of the ponderomotive force induced by ULF traveling waves, using the nonlinear stationary force balance equation.…

Earth and Planetary Astrophysics · Physics 2015-06-04 A. K. Nekrasov , F. Z. Feygin

Inertia effects in magnetization dynamics are theoretically shown to result in a different type of spin waves, i.e. nutation surface spin waves, which propagate at terahertz frequencies in in-plane magnetized ferromagnetic thin films.…

Mesoscale and Nanoscale Physics · Physics 2021-06-02 Mikhail Cherkasskii , Michael Farle , Anna Semisalova