scholarly journals Микромагнитное моделирование спин-волновых возбуждений в гофрированных пленках ЖИГ

2019 ◽  
Vol 61 (9) ◽  
pp. 1652
Author(s):  
В.К. Сахаров ◽  
Ю.В. Хивинцев ◽  
Г.М. Дудко ◽  
С.Л. Высоцкий ◽  
Ю.А. Филимонов
Keyword(s):  
Spin Wave ◽  
Wave Spectrum ◽  
Short Wave ◽  
Film Plane ◽  
Spin Wave Excitations ◽  
Periodical Structure ◽  
Distribution Of Magnetization ◽  
Effective Excitation ◽  
Film Form ◽  
Spin Wave Spectrum

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.

Spin-Wave Spectrum in the Sinusoidal Superlattice with Amplitude and Phase Inhomogeneities

2014 ◽  
Vol 215 ◽  
pp. 385-388
Author(s):  
Valter A. Ignatchenko ◽  
Denis S. Tsikalov
Keyword(s):  
Spin Wave ◽  
Density Of States ◽  
Wave Spectrum ◽  
The Self ◽  
One Dimensional ◽  
Consistent Approximation ◽  
Self Consistent ◽  
Greens Function ◽  
The One ◽  
Spin Wave Spectrum

Effects of both the phase and the amplitude inhomogeneities of different dimensionalities on the Greens function and on the one-dimensional density of states of spin waves in the sinusoidal superlattice have been studied. Processes of multiple scattering of waves from inhomogeneities have been taken into account in the self-consistent approximation.

Spin wave spectrum of quasi-two-dimensional antiferromagnet NH3(CH2)2NH3MnCl4

1994 ◽  
Vol 194-196 ◽  
pp. 187-188 ◽  
Author(s):  
V.V. Eremenko ◽  
V.I. Fomin ◽  
V.S. Kurnosov
Keyword(s):  
Spin Wave ◽  
Wave Spectrum ◽  
Two Dimensional ◽  
Spin Wave Spectrum

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

2018 ◽  
Vol 60 (11) ◽  
pp. 2105
Author(s):  
Е.В. Васинович ◽  
А.С. Москвин ◽  
Ю.Д. Панов
Keyword(s):  
Phase Transition ◽  
Spin Wave ◽  
Superconducting State ◽  
Ground State ◽  
Wave Spectrum ◽  
Hard Core ◽  
Boson Systems ◽  
Variable Valence ◽  
Anisotropic System ◽  
Spin Wave Spectrum

Abstract —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.

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