Parametric and modulation instabilities of magnetostatic surface spin waves in ferromagnetic films

Abstract

Articles you may be interested inUnidirectional propagation of magnetostatic surface spin waves at a magnetic film surface Appl. Phys. Lett. 105, 232403 (2014); 10.1063/1.4903742 Bragg resonances of magnetostatic surface spin waves in a layered structure: Magnonic crystal-dielectric-metal Appl. Phys. Lett. 100, 252412 (2012); 10.1063/1.4730374Mode-conversion enhancement of guided optical waves by magnetostatic surface waves propagating collinearly in obliquely magnetized bismuth-doped yttrium-iron-garnet film waveguide First-order parametric instability, modulation instability and second-order instability processes for magnetostatic surface waves propagating in a pure yttrium iron garnet film are investigated in accordance with the relationship between the magnetostatic wave frequency and the internal magnetic field. The transitions from the second-order parametric instability, via the modulation instability, to the first-order parametric instability ͑when the magnetic field is 720 Oe and the carrier frequency varies from 3.87 to 4.39 GHz͒, and the transitions from the first-order parametric instability to the second-order parametric instability via the modulation instability ͑when the carrier frequency is 3.5 GHz and the magnetic field varies from 427 to 647 Oe͒ are experimentally observed and explained. Dispersion characteristics of the magnetostatic surface waves are modified by introduction of a metallic ground plane in order that the Lighthill criterion, as one of the prerequisites for onset of the modulation instability, is fulfilled in a limited frequency range. Characteristics of magnetostatic surface wave modulation instability are studied by solving the nonlinear Schrödinger equation. Dependencies of the modulation frequency induced by the modulation instability on the carrier frequency and the magnetic field are found to be consistent with experimental data.

Frequency and power dependence of spin-current emission by spin pumping in a thin-film YIG/Pt system

“…The FMR frequency cannot be lower than f H , 32 and thus, the excitation frequency should be higher than 2f H in order that the process described by the above equation can take place. Consequently, the upper frequency limit f cutoff , for a thick sample system of YIG is f cutoff = 2 3 f M , where f M = γ μ 0 M. In the experiment of Kurebayashi et al, 11 they have used a YIG sample with a thickness of 5.1 μm, which is higher than the exchange correlation length, and therefore…”

Modulation instability in RF MEMS devices

“…Modulation instability has been observed in many physical systems, encompassing optical fibers [18], non-linear magneto-static waves [19,20], etc., and it is originated by small second order terms in the high frequency signal propagating in a dispersive medium. The analytical frame for the above mentioned effects is the nonlinear Schrodinger equation, where non-linearity and dispersion play a key role in the kind of effects which can be detected, and both instabilities and solitons could be obtained (see, for instance, [21]).…”

Influence of Dissipation on Magnetostatic Surface Waves Dispersion

“…Magnetostatic surface waves (MSSW) propagating in ferrite films are the basis for the construction of number microwave devices for analog data processing, information transfer and control of high frequency dynamics [1][2][3][4]. Minimization of wave losses is a key requirement for its correct work, however the MSSW damping is not studied enough as the vast majority of research is performed without consider attenuation [4][5][6].…”

“…Minimization of wave losses is a key requirement for its correct work, however the MSSW damping is not studied enough as the vast majority of research is performed without consider attenuation [4][5][6]. Although, the damping may significantly transform the dispersion law [7].…”

“…In the most invesigations [3][4][5][6][7], propagation of MSSW is studied in the special case when wave is transferred perpendicularly to the direction of the permanent external magnetic field. However, the wave propagation at arbitrary angles is essential for some devices, such as multichannel filters [1,2].…”