Spin wave dispersion

Author: hifu

August undefined, 2024

WebMar 7, 2024 · The corresponding analytical description of the spin-wave dispersion relation for the case of a ferromagnetic film in the (111) orientation having uniaxial and cubic anisotropy with unpinned surface spins has been obtained by Kalinikos et al. 40 40. B. A. Kalinikos, M. P. Kostylev, N. V. Kozhus, and A. N. Slavin, J. Phys.: Condens. WebMotivated by recent experiments on thin films of the ferromagnetic insulator yttrium-iron garnet (YIG), we have developed an efficient microscopic approach to calculate the spin-wave spectra of these systems. We model …

Phys. Rev. 120, 1978 (1960) - General Spin-Wave …

WebThe band width of the spin wave-like dispersion is almost constant from the non-doped to optimum-doped region, which is followed by a large reduction in the overdoped region. This suggests that ... WebApr 17, 2009 · It covers magnetic susceptibilities and electromagnetic waves in anisotropic dispersive media among other topics. There are … help lulu.toys

Between waves and patterns: Spin wave freezing in films with ...

WebMar 15, 2024 · The magnitude of this energy gap can be estimated from the spin-wave dispersion relation derived analytically. This may be important especially for systems where the anisotropy energy can be tuned externally, for instance by means of chemical, strain or electric field methods. WebJun 25, 2024 · Spin wave dynamics form the foundation of spin-torque oscillator (STO) modulation. In addition to the uniform spin wave mode with wave vector k = 0, multiple spin wave modes with different wave vectors and frequencies coexist in the nanoscale STO. WebDec 9, 2011 · We present the numerical calculations of spin wave dispersions in magnetic nanostructures. The dispersion is obtained by processing the space–time data calculated … help loneliness

Dynamic coupling and spin-wave dispersions in a magnetic hybrid …

Magnons: Spin-Waves in Magnetic Materials - University of …

WebApr 11, 2024 · Alternatively, a spin order could result from a coherent addition of several SDWs with different wave vectors, and a double-Q SDW was proposed to account for the spin order in Sr 0.63 Na 0.37 Fe 2 ... WebJun 3, 2015 · The anisotropy of the spin-wave dispersion has far reaching consequences regarding spin-wave transport in two dimensions. One consequence is the preferred propagation direction in the spin system … help luminess airWebApr 24, 2024 · Here, we show a switchable giant nonreciprocal frequency shift of propagating spin waves in interlayer exchange–coupled synthetic antiferromagnets. The … help loan limit 2023

"WebDec 9, 2011 · We present the numerical calculations of spin wave dispersions in magnetic nanostructures. The dispersion is obtained by processing the space–time data calculated using the finite difference method based micromagnetic simulations. " - Spin wave dispersion

Spin wave dispersion

WebOct 17, 2008 · The spin waves show a linear dispersion with a velocity of 160+/-10 meV A and lifetimes that scale linearly with energy in agreement with neutron scattering and … WebApr 11, 2024 · To solve the transmission problem of the NG/SG junction, as shown in Fig. 1(a), we assume that an incident electron with incident angle θ is injected into the graphene-based normal layer at η valley with spin ρ σ. The wave function in these two regions can be expressed as follows: 38,50 38. J.

Did you know?

WebJan 1, 2013 · We study the magnetization dynamics and describe methods of extracting features from simulations. Spin wave dispersion curves, relating frequency and wave vector, are obtained for wave... WebDec 9, 2024 · The spin-wave dispersion (the relationship between the spin-wave frequency f and the wave number k) depends on various parameters, such as the waveguide geometry (Chumak et al., 2014), Oersted field induced by the electric current (Rousseau et al., 2015) and spin-wave material properties (Qin et al., 2024), etc. Among these parameters, the ...

Web3 Magnons: Spin-Wave Excitations Let us now return to the Heisenberg model and apply the results of the previous ... A plot of the dispersion relation along the k1 momentum axis is included below. One can see that the low-energy behaviour is parabolic ! … Spin waves are observed through four experimental methods: inelastic neutron scattering, inelastic light scattering (Brillouin scattering, Raman scattering and inelastic X-ray scattering), inelastic electron scattering (spin-resolved electron energy loss spectroscopy), and spin-wave resonance (ferromagnetic resonance). In the first method the energy loss of a beam of neutrons that excite a magnon is measured, typically as a function of scattering vector (or equivalently mo…

WebSpin wave excitation and propagation properties in a permalloy were investigated using a vector network analyzer for the magnetostatic surface wave (MSSW) and magnetostatic … WebAngular dispersion can counterbalance normal group‐velocity dispersion (GVD) that increases the wave‐vector length in a dispersive medium. By tilting the wave vector, angular dispersion ...

WebApr 15, 2024 · Zero-field optically pumped magnetometers operating in the spin-exchange relaxation-free (SERF) regime have been extensively studied, and usually depend on zeroth-order parametric resonance to measure the magnetic field. However, the studies conducted on this topic lack thorough analyses and in-depth discussion of nonzero-order magnetic …

WebJun 15, 2024 · Systematic analysis of the impact of the spin-wave interaction in the pressure. Abstract We derive higher-order corrections in the magnon dispersion relations … helpmans pastaWebMar 1, 2024 · Whether in magnetic films or waveguides, the dispersion relation of spin waves can be divided into three regions: magnetostatic waves with small wavenumber, exchange waves with large wavenumber, and dipolar-exchange spin waves (DESWs) for which the wavenumber is between the first two. helpman japan 調査WebFeb 21, 2024 · Dispersion relations for propagating short-wavelength spin waves. a Data points show the frequencies and wavenumbers of different spin-wave modes extracted from the experiments on device... Metrics - Long-distance propagation of short-wavelength spin waves help mailblueWebFeb 28, 2024 · We derive analytically AFM spin-wave dispersion in the presence of the DMI which accounts for our experimental results. The AFM spin waves excited by nanometric coplanar waveguides have large wave vectors in the exchange regime and follow a quasilinear dispersion relation. help loan statusWebSep 27, 2024 · We present a combined experimental and numerical study of the spin-wave dispersion in a NiFe artificial spin-ice (ASI) system consisting of an array of stadium … helpmaniaWebSpin waves—the elementary excitations of magnetic materials—are prime candidate signal carriers for low-dissipation information processing. Being able to image coherent spin-wave transport is crucial for developing interference-based spin-wave devices. helpman milltimeWebMar 10, 2024 · Dispersion characteristics (b) of waveguide sections A and B. Spatial-frequency dependences of the region of coexistence of BVMSW and MSSW on the width and thickness of the waveguide (c). PPT High resolution To study spin-wave transport, micromagnetic modeling (MM) was carried out in the MuMax 3 16 16. A. help maintain