Effects of molecular adsorption on the spin-wave spectrum and magnon relaxation in two-dimensional Cr2Ge2Te6

Molecular adsorption has remarkable impacts on the exchange constant and magnon–phonon scattering of magnetic materials.

Spin Wave Modes in a Cylindrical Nanowire in Crossover of Dipolar-Exchange Regime

Although the magnetic wires have been [1] broadly investigated, some of their dynamicalproperties, like: (anti)crossing between the spin wave modes and the impact of the magnetic field onthe spin wave spectrum, still need to be explored. [...]

Микромагнитное моделирование спин-волновых возбуждений в гофрированных пленках ЖИГ

Particularities of the spin-wave spectrum in YIG film with the thickness of 0.4 μm and magnetization of 1.1 kG that was corrugated due to the periodical substrate relief in the form of grooves having width of 10 μm, depth of 0.5 μm, sloped walls and period of 20 μm were studied with the help of micromagnetic modelling. Calculations were carried out for the external magnetic field applied along (θ=0) and across (θ=90°) the grooves in the film plane, and showed that the anisotropy from the film form caused the spectrum quantization and localization of spin-wave excitations in the different parts of the sample. Besides that, spacial distribution of magnetization amplitude at fixed frequencies in the spectrum for θ=90° can be characterized by several spacial scales that differ by orders. This is explained by the strong inhomogeneity of equilibrium state at grooves' walls for θ=90° that leads to the effective excitation of short-wave part of the spin-wave spectrum in the periodical structure by Schlömann mechanism.

Конденсация (псевдо)магнонов в двумерной анизотропной S=1 (псевдо)спиновой системе

—A 2D anisotropic system of S = 1 centers of the charge triplet type in systems with variable valence or “semi-hard-core” boson systems with a limitation for the occupation of lattice sites n = 0, 1, 2 is studied in the framework of the pseudospin formalism. Assuming that the ground state is a quantum paramagnet, the pseudo-spin wave spectrum and also the conditions of the condensation of pseudomagnons with a phase transition to a superconducting state have been found using the Schwinger boson method.

Magnonic band spectrum of spin waves in an elliptical helix

We show that the spin-wave spectrum in an elliptical helix has a band character. The size of the first band gap calculated using the perturbation theory is shown to scale as square root of the eccentricity. Curved magnonic waveguides of the kind considered here could be used as structural elements of future three-dimensional magnonic architectures.